CN208026591U - A kind of high temperature venting degree tester - Google Patents
A kind of high temperature venting degree tester Download PDFInfo
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- CN208026591U CN208026591U CN201820196819.3U CN201820196819U CN208026591U CN 208026591 U CN208026591 U CN 208026591U CN 201820196819 U CN201820196819 U CN 201820196819U CN 208026591 U CN208026591 U CN 208026591U
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Abstract
The utility model discloses a kind of high temperature venting degree testers, include specimen holder, gas heater, the specimen holder includes piston made of heat proof material, spill cylinder body, the inverted trapezoidal cavity of piston internal upper part is connected together to form inverted trapezoidal step cavity with the inner cavity of piston extension, and piston slide fit is in spill cylinder body；Gas heater is equipped in spill cylinder wall, the gas heater is the helical duct being located in spill cylinder wall, and the helical duct gas outlet for being located at spill cylinder base is connected to ladder cavity, and helical duct air inlet is located at spill cylinder body top.It is tested with the utility model, test temperature can be increased to 1000 DEG C or more, improve the stability and accuracy rate of test data.
Description
Technical field
The utility model patent is related to refractory material permeating degree tester device, more particularly to a kind of high temperature venting degree test
Instrument.
Background technology
The air permeability of refractory material generally refer to refractory product allow under certain pressure difference gas by performance, be fire resisting
One important parameter of product.
China's national standard《GB/T3000-1999 densification shaping refractory product air permeability test methods》Adopting by equivalent
International standard《ISO 8841:The measurement of 1991 fine and close shaping refractory product-air permeabilities》, Unite States Standard《ASTM C 577-
1999 refractory material air permeability test methods》Only by ISO 8841:The cylindrical sample of 1991 φ 50mm × 50mm is changed to
The cuboid sample of 51mm × 51mm × 51mm.These standards are the test method that refractory product air permeability is tested under room temperature.
International standard《ISO 8841:The measurement of 1991 fine and close shaping refractory product-air permeabilities》Give air permeability test
The structure of instrument：It is made of air source, gas flow measurement meter, specimen holder, pressure gauge, vernier caliper etc..The examination of the air permeability
Sample clamper is made of upper press cover, specimen holder, lower cover, gas tube and aerated film；Aerated film is made of rubber membrane, in circle
Tubular is placed in cylinder shaped test piece retainer, and both ends are sleeved on the both ends of specimen holder, then above, lower cover compresses, up and down
The seal face of gland is plane, is fastened by bolt；Full of the pressed gas imported by air-filled pore outside aerated film, to ensure cylinder
It is closed, airtight that the sample side of shape is inflated film.
American National Standard《ASTM C 577-1999 refractory material air permeability test methods》, seal the rubber finger sleeve of sample
It is square internally and round externally pyramidal for two, it is non-inflatable outside rubber finger sleeve, and clasped with internal tapered metal clamper, then with thousand
Jin top pressure is tight, and rubber finger sleeve is made to be in close contact with sample, keeps air-tight state
The ZL200720187614.0 of Zhong Gangluonai institutes《A kind of specimen holder of permeating degree tester》Comprising by filling
Air film, specimen holder ontology, upper press cover and lower cover are constituted, and aerated film is arranged in the inside of specimen holder ontology, special
Sign is：Taper dead ring, dead ring and pushing upper part of the cover are provided between upper press cover and specimen holder ontology upper port
Section is tapered, and taper matches with the taper in specimen holder ontology upper port, lower port respectively.
It is well known that castable refractory is before use, if castable refractory can be discharged rapidly because by thermogenetic water
Steam or other escaping gas, so that it may avoid cracking or bursting caused by exhaust is unsmooth in drying process；In high temperature work
In industry, gas infiltration, every inflammation burning, gas phase reaction sintering etc. nowhere loses the chance of gas and solid contact, material it is saturating
The penetrating power of gas or gas is all high temperature using the project for needing to study, naturally, scientific and technical research just needs hot permeability
This tool of test equipment.
The country only has the room temperature air permeability test equipment of refractory product, and foreign countries are existing can to test 800 DEG C or less refractory castings
The permeability equipment of material.The equipment includes by heat-resistance stainless steel SS-310（870 DEG C of maximum operation (service) temperature）Manufactured volume is
140cm3An air inlet and an outlet circular cylindrical cavity, a cylindrical sample frame made of specific alloy, by not
Rust steel bolt is fixed between hydrostatic column.Sample size is usually diameter 75mm（60mm is exposed to air stream and 15mm samples
Product support）, thick 20-30mm.Air is by compressor（2 horsepowers）Supply directly reaches container bottom by the SS-316L pipes of 6mm.
Compressor is equipped with dehumidifying oil-isolating device and control pressure to the valve system of 0-10bar, is measured and is held with electronic pressure transmitter
The pressure of device import and export.Container and sample are placed in electric furnace（7500W）, heating process is controlled by PID controller, this
Allow to be programmed to up to 10 rates of heat addition and 10 plateau temperatures.Before air reaches sample, pass through a 2m long in stove
Wire coil preheating.Container out temperature is by the chromium nickel-aluminum thermocouple measurement perpendicular to sample.Copper-constantan thermocouple is used
Air themperature near monitoring pressure sensor and into flowmeter.Air velocity is transferred to heat exchange by being located at sample export
Rotameter after device（0-40L/min）And soap bubble flowmeter（0 10 liters/min）It measures.
Prior art defect：1）GB/T3000-1999 and ISO 8841:1991,ASTM C577-1999,
ZL200720187614.0, sample are placed in the dress model machine structure for being equipped with rubber finger sleeve, and sample appearance is tightly wrapped up by rubber finger sleeve
Face, air-tightness is very outstanding, is appropriate only for the test of room temperature air permeability, but cannot bear high temperature；2）800 DEG C of height of existing foreign countries
Built-in sample, sample frame and circular cylindrical cavity are fastened together by heat-resisting bolt, are placed in high temperature furnace by warm permeating degree tester,
The structure of sample and these heat-resisting steel members, shape, heated not consistent, thermal expansion amount is also difficult to synchronize, and necessarily causes
Chucking power is unbalance, fluctuation, and the easy gas leakage of sample end face retained part and sample side causes the distortion of test data；Moreover, installation
Or sample is taken out, and bolt is opened every time, it is cumbersome；3）In order to fix sample, using heat-resisting o-ring, equally, metal O
Type heat-resistant rings, also without the ability of reliable closed sample periphery gas leakage, for finer and close material, it is difficult to carry out air permeability survey
Examination；4）Gas economizer bank is wrapped on the outside of sample frame, and not only structure is in disorder, but also close to heating element, and safety is poor；5）Examination
Sample end high-temperature gas reaches the stream measured quantity that gas could be carried out after the temperature that instrument can measure through complicated cooling, and
The heated sample for there are the volatile matters such as moisture to generate such as castable ties test due to the uncertainty of mixed gas viscosity
Fruit can adversely affect.
Invention content
The utility model aim is to provide a kind of high temperature venting degree tester, for overcoming prior art test temperature low,
Sample holder is excessively cumbersome, sealing effect is not good enough, load is unstable, sample replaces inconvenient, sample end gas and handles complicated, flow
The defects of test is inaccurate.
Following technical solution can be used to realize in the purpose of this utility model：A kind of high temperature venting degree tester includes
Air supply system, hot test stove, specimen holder, gas heater, sample seal, densification mechanism, gas cooling mechanism, control
Cabinet processed, computer, the specimen holder include piston made of heat proof material, spill cylinder body, and piston internal upper part falls ladder
Shape cavity and the inner cavity of piston extension are connected together to form inverted trapezoidal cavity, and piston slide fit is in spill cylinder body；Spill cylinder
The internal ladder cavity of lower part and the inner cavity of the cylinder body extension below spill cylinder base are connected together to form trapezoidal cavity,
The platform on trapezoidal cavity top is sample platform；Gas heater is equipped in spill cylinder wall, the gas heater is to be located at
The quick interface of gas outside helical duct and spill cylinder body in spill cylinder wall, the helical duct for being located at spill cylinder base go out
Gas port is connected to ladder cavity, the quick interface of gas and air supply system unicom.
When the spill cylinder body, cylinder body extension and piston, piston extension are used cooperatively, center line is located at one directly
On line.
It is described make piston, spill cylinder body heat proof material be can bear 1000 DEG C or more High-temperature resistant alloy material or
Inorganic non-metallic material.
The air supply system include measure gas flow, temperature, pressure gas measurement system, gas measurement system is logical
It crosses pipeline to connect with the quick interface of gas, the electronic signal of gas measurement system is connect by switch board with computer；
The described close mechanism of pressurization includes organic block, is fixed on engine base support column is connected to the outstanding of upper end of support column
Arm；The lead screw loader lower end being located on cantilever is connected with downwards Universal-head, pressure sensor, pressure head, piston extension in turn；
Pressure sensor is connect with switch board；Described is fixed with quick push-pull structure on engine base, interior to be equipped with plug sealing material
With end face O-ring seal, quick push-pull structure is tightly connected with spill cylinder body extension lower end.
The sample lower part being located inside trapezoidal cavity is provided with low pressure meter and lower part thermocouple, and quick
Push-pull structure is connect after being tightly connected with switch board, the pressure catheter port of low pressure meter and the thermometric end of lower part thermocouple
It is located at away from the 15-20mm of sample lower face；Sample upper pressure meter and the upper thermocouple being located inside inverted trapezoidal cavity, pass through
Piston extension upper end is connect with switch board；The thermometric end of upper thermocouple and the pressure catheter port of upper pressure meter, if
At away from sample upper surface 15-20mm.
The gas cooling mechanism is by the heat dissipation tank being fixed on outside pressure head and the spiral radiator group being located in heat dissipation tank
At.One end of spiral radiator is connected to the babinet exhaust outlet being located on heat dissipation tank, and the inner cavity of the other end and piston extension is passed through
Logical, sample upper thermocouple and upper pressure meter and piston have enough gaps between extending inside pipe wall, are equipped in heat dissipation tank
Flow cooling water.
The sample seal is had platform-like body made of the nonmetallic materials of densification, shape ruler high temperature resistant
Very little and spill cylinder body inside dimension joint match, inside dimension and sample joint match.Platform-like body is by platform body and upper lower gasket
Composition, platform body are located between lower gasket, and platform body is consistent with upper lower gasket appearance and size, are highly less than spill cylinder body
Highly, shape is torus, polygonal body or ellipsoid body.
The sample seal high temperature resistant have densification nonmetallic materials made of step-like body, step-like body by
Upper seal and lower seal are buckled togather composition, and appearance and size is matched with spill cylinder body inside dimension coincide, inside dimension with
Sample joint match, is highly less than spill height of cylinder, and shape is torus, polygonal body or ellipsoid body.
A kind of test method of high temperature venting degree tester：
A. the preparation of sample：On fire resistive material product, by drilling through, cutting, edge polish process be made it is close with sample
The sample that envelope intracoelomic cavity shape matches；Unsetting material sample can use molding, maintenance of the mold according to unsetting material
Prepared by technique, prepare rear spare.Sample can be made diameter 75mm × (20-30) mm's or length of side 75mm × 75mm × 25mm
Sheet.
B. the installation of sample：To system power supply, air supply system is closed, by opposite opened hot test stove to outward turning
Turn to open, start the lead screw loader of tight mechanism, drives the piston of Universal-head, pressure sensor, pressure head and specimen holder
It moves up and is detached from spill cylinder body, and rotated to side, make piston far from spill cylinder body；Open the quick interface of gas, gas supply system
System is detached with gas heater, on the workbench outside the spill cylinder body to furnace body of upward withdrawing specimen holder, clears up spill
After cylinder interior.Sample is wrapped in the cavity of sample seal, the sample that sample seal is placed on to spill cylinder body is put down
On platform, measure, check the lower part thermometric end of the lower part pressure catheter port, lower part thermocouple that enable sample low pressure meter
It is at the positions 15-20mm of sample lower face；Cylinder body extension pipe end is inserted on quick push-pull structure and is sealed；Rotation pressure
The cantilever of close mechanism, make specimen holder piston reach spill cylinder body surface center line on, be again started up lead screw and add
Device is carried, piston is made to enter in spill cylinder body and compresses sample seal, pressure sensor measures and transmits pressing force to switch board
And computer, so that its pressing force is reached preset value by computer control, and continue to keep, is closed opposite opened high-temperature heater
Body.
C. parameter typing：In a computer, typing sample name, specifications and models, sample material, specimen finish φ or side
Length, thickness δ, quality G, density p, test temperature, air permeability predicted value, information above of the system according to input, automatically give pressure
Clamp force, temperature increasing schedule, soaking time, given gas pressure, given gas flow；Can also be according to needs, manual amendment is corresponding
Parameter.
D. it runs：Start computer, is cooled down to gas cooler, pressure sensor cooling body, furnace body by switch board
Mechanism supplies water；Computer starts heating system automatically, and switch board is powered according to computer instruction to high-temperature heater, and furnace temperature is pressed
According to temperature programming, reaches preset temperature and start to keep the temperature；Start air supply system gas supply, the pressure regulation for gas supply valve of gas measurement system supplies
Gas thermometer, supply gas pressure meter, gas mass flow gauge automatic measuring and controlling, the supply gas pressure P of gas measurement system0, gas supply flow
Q0, feed air temperature T0Switch board Automatic Detection and Control is passed through by computer；Gas reaches gas heater through the quick interface of gas
Helical pipe is assembled after being heated to test temperature T in terraced steps cavity；Gas pressure after sample lower surface is heated
P1, temperature T1Switch board and Computer display are passed to after sample low pressure meter, lower part thermocouple measurement and are recorded；Work as examination
Sample following table surface pressure P1Up to after certain value, gas passes through inside sample, in the inverted trapezoidal step cavity for reaching sample top, if
The sample upper surface gas temperature T that thermo detector, upper pressure meter will measure on sample top2, pressure P2Switch board is passed to, is passed through
Switch board is transferred to computer and is detected calculating；It is cooled down into the gas in inverted trapezoidal step cavity through gas cooling mechanism
Afterwards, it is discharged from exhaust outlet；
E, result calculates：
……()
In formula：
V --- pass through the gas volume of sample, m under test temperature3；
T --- gas passes through the time of sample, s；
The air permeability of μ --- sample, m2；
η --- the dynamic viscosity of gas, Pas under test temperature；
A --- gas by sample cross-sectional area, m2；
The thickness of δ --- sample, m；
P --- the absolute pressure of gas, Pa under test temperature；
P1 --- gas enters the absolute pressure at sample end, Pa under test temperature；
P2 --- the absolute pressure at gas effluent test sample end, Pa under test temperature.
Formula（1）It is consistent with Darcy laws, it is exported by Hagen-Poiseuille laws.
Formula（1）It can be rewritten as：
………..(2)
The dynamic viscosity η of gas, meets Sutherland equations, by formula under test temperature（3）It calculates:
..….(3)
In formula：
η --- the viscosity of gas when temperature T
—1.67×10-3, Pas（When 0 DEG C of standard state, N2Viscosity number）
T --- test temperature, K
T0--- standard state 273, K
C --- Sutherland constants, N2, C=106.7（K）
For nitrogen,（3）Formula can be rewritten as formula（4）
……(4)
Due to unit volume flow, meet formula（5）
V0=Q0t……………..……(5)
In formula：
V0--- the volume for the gas that flow measurement obtains, m3
T --- time, S
Q0--- the flow for the gas that flow measurement obtains, m3/s
It will（5）Formula substitutes into（2）Formula then has formula（6）：
……..(6)
Since the pressure P of gas, volume V, temperature T meet formula（7）
……………….…..……..…………..(7)
It will（5）It substitutes into（7）Formula then has formula（8）：
……………….…..……..…………..(8)
It will（8）Formula can be rewritten as, formula（9）
………….…..…………..…..(9)
It will（9）Formula substitutes into（2）Formula then has formula（10）
…….(10)
It arranges（10）Formula then has formula（11）
……....(11)。
The advantages of the utility model patent：1. due to the utility model by sealing material by original rubber finger sleeve or rubber membrane
It is replaced with heat safe sealing material, specimen holder is made into heat safe specimen holder, thus highest can be tested temperature
Degree is increased to 1000 DEG C or more.2. gas flow surveying instrument controllable flow rate and the sensor for exporting electronic signal, in reality
Measurement process automation can be realized while now automatically recording flow with automatic control flow size.3. by gas heater
It is located in spill cylinder body, realizes heating and specimen holder integrated design, simplified device structure.4. due to the use of furnace body
Outer densification mechanism applies pressure, and seal is made to seal sample, and sealed pressure caused by making experiment process expand with heat and contract with cold keeps steady
It is fixed, effectively prevent the leakage of gas, helps to improve the stability and accuracy rate of test data.
Description of the drawings
Attached drawing 1 is high temperature venting degree tester schematic diagram；
Attached drawing 2 is the closed schematic diagram of sample holder；
Attached drawing 3 is the structural schematic diagram that sample seal is an embodiment, and platform body combines connection with upper lower gasket
Together；
Attached drawing 4 is the structural schematic diagram that sample seal is another embodiment, and seal combines company with lower seal thereon
It is connected together.
In figure：1. air source, 2. gas measurement systems, the quick interface of 3. gases, 4. engine bases, 5. lower part thermocouples, under 5.1.
Portion thermometric end, 6. low pressure meters, 6.1 lower part pressure catheter ports, 7. quick push-pull structures, 7.1. plug sealing material,
7.2. end face O-ring seal, 8. cylinder body extensions, 9. refractory materials, 10. gas heaters, 11. platform bodies, 11.1. or more
Gasket, 11.2. upper-lower seal bodies, 12. samples, 12.1. sample platforms, 13. spill cylinder bodies, 14. upper pressure meters, on 14.1.
Portion pressure catheter port, 15. piston extensions, 15.1. pistons, 16. gas cooling mechanisms, 17. upper thermocouples, on 17.1.
Portion thermometric end, 18. pressure heads, 19. pressure sensors, 20. Universal-heads, 21. cantilevers, 22. lead screw loaders, 23. support columns,
24. babinet exhaust outlet, 25. switch boards, 26. computers, 27. inverted trapezoidal cavitys, 28. ladder cavities.
Specific implementation mode
It is described in further detail in conjunction with attached drawing 1,2,3,4 pairs of the utility model.
Apply example 1：
As shown in Figure 1, 2, 3, a kind of high temperature venting degree tester, further include have opposite opened hot test stove, air supply system,
Sample seal, the densification mechanism of handwheel driving, switch board 25, computer 26, specimen holder；The specimen holder includes
The spill cylinder body 13 for having piston 15.1 made of 310S heat resisting steel, matching with piston 15.1,15.1 slide fit of piston is in spill cylinder
In body 13, the ladder cavity 28 of lower part and the cylinder body extension for being fixedly connected on 13 bottom part down of spill cylinder body in spill cylinder body 13
8 inner cavity is connected together to form trapezoidal cavity 28, and the platform on 28 top of trapezoidal cavity is sample platform 12.1, in piston 15.1
The inverted trapezoidal cavity 27 on top is connected together to form inverted trapezoidal cavity 27 with the inner cavity of piston extension 15；13 wall of spill cylinder body
It is equipped with gas heater 10, the gas heater 10 is the helical duct being located in 13 wall of spill cylinder body and spill cylinder body 13
The quick interface 3 of outer gas, the helical duct gas outlet for being located at 13 bottom of spill cylinder body are connected to ladder cavity 28, helical duct
Air inlet is located at 13 top of spill cylinder body.For improve compress effect, the spill cylinder body 13, cylinder body extension 8, piston 15.1,
Piston extension 15 and quick push-pull structure 7 and lead screw load machine 22, Universal-head 20, pressure sensor 19, pressure head 18
Center line is set point-blank.
Specimen holder is made of the High-temperature resistant alloy material or inorganic non-metallic material that can bear 1000 DEG C or more, than
Such as it is made of the dense alumina of inorganic non-metallic material ceramics or 310S heat resisting steel.
Embodiment 2：
As shown in Figure 1, 2, on the basis of embodiment 1, the air supply system includes to measure gas flow, temperature, pressure
The gas measurement system 2 of power, gas measurement system 2 are connected by pipeline and the quick interface 3 of gas, the electricity of gas measurement system 2
Subsignal is connect by switch board 25 with computer 26；The support column that the close structure of the pressurization includes organic block 4, is fixed on engine base
23, it is connected to the cantilever 21 of 23 upper end of support column；The lead screw loader 22 being located on cantilever 21 is servo drive system, and servo is driven
Dynamic system is connect with switch board 25 and computer 26, and the lower end of lead screw loader 22 is connected with downwards Universal-head 20, pressure in turn
Sensor 19, pressure head 18, piston extension 15；Pressure sensor 19 is connect with switch board 25；It is located at 28 the inside of trapezoidal cavity
12 low pressure meter 6 of sample, lower part thermocouple 5 are connect after being tightly connected with quick push-pull structure 7 with switch board 25, lower part pressure measurement
Catheter port 6.1, lower part thermometric end 5.1 are located at away from 12 lower face 15-20mm of sample；It is located at 27 the inside of inverted trapezoidal cavity
12 upper pressure meter 14 of sample is connect across 15 upper end of piston extension with switch board 25；It is located at the examination of 27 the inside of inverted trapezoidal cavity
12 upper thermocouple 17 of sample passes through 15 upper end of piston extension, pressure head 18 to be connect with switch board；12 top pressure catheter end of sample
Mouth 14.1, top thermometric end 17.1 are located at away from the 15-20mm of sample upper surface；The quick push-pull structure 7 being fixed on engine base 4
It is tightly connected with 8 lower end of cylinder body extension.To further increase sealing performance, can be arranged in 8 lower end of cylinder body extension O-shaped close
Seal 7.2.Piston extension 15 is by gap between sample upper thermocouple 17 and piston extension 15 and is located at pressure head 18
Spiral radiator one end connection of external gas cooling mechanism 16；The gas cooling mechanism is by being fixed on dissipating outside pressure head 18
Hot tank and the spiral radiator composition being located in heat dissipation tank, the spiral radiator other end and the babinet exhaust outlet being located on heat dissipation tank
24 connections, heat dissipation tank is interior to be equipped with flowing cooling water.The pressure head 18 can be set as hollow form.
Embodiment 3：
As shown in Figure 1, 2, 3, on the basis of embodiment 2, the sample seal has the non-of densification by high temperature resistant
Platform-like body made of metal material, platform-like body are made of platform body 11 and upper lower gasket 11.1, and platform body is annulus
Shape is located between annular shim up and down；Platform body outer diameter and upper and lower annular shim outer diameter match kiss with 13 internal diameter of spill cylinder body
It closes, platform body height is less than 13 height of spill cylinder body.Upper and lower annular shim internal diameter is less than sample outer diameter at least 5mm, that is,
Say down that upper annular gasket will cover sample lower edges region.Sample 12 is located to be surrounded by platform body 11 and upper lower gasket 11.1
Cavity in, also just in the cavity of sample seal.12 both ends of the surface centre of sample is exposed to ladder cavity 28 and falls terraced
Area at shape cavity 27 is less than the inner ring area of upper annular gasket or lower annular shim, generally φ 60mm.Sample seal
It can be made of graphitized filamentary material or material containing mullite fiber.
Embodiment 4：
As shown in Fig. 1,2,4, on the basis of embodiment 2, the sample seal has the non-of densification by high temperature resistant
Step-like body made of metal material, step-like body are buckled togather and are formed by upper seal cup 11.2 and lower seal cup 11.2, platform
Step-like member outer diameter is matched with spill cylinder diameter to coincide, and is highly less than 13 height of spill cylinder body.Sample 12 is located at by step-like body
Upper seal 11.2 and step-like body the cavity that surrounds of lower seal 11.2 in, also with regard in the cavity of sample seal.Examination
12 both ends of the surface centre of sample be exposed to the area at ladder cavity 27 and inverted trapezoidal cavity 28 be upper seal 11.2 or under it is close
The area for sealing body 11.2, may generally be φ 60mm.It is that graphite is fine that high temperature resistant described herein, which has the nonmetallic materials of densification,
Dimension contains mullite fiber.
Embodiment 5：
It on the basis of embodiment 4, is tested, experiment process is as follows：
A. the preparation of sample：On 400*300*25 carborundum plates, by drilling through disc-shaped sample 12；Measure sample 12
Diameter phi=75.1mm, thickness δ=25.2mm；Weigh the quality 295.5g of sample；Bulk density 2.65g/cm3 is calculated, by sample
12 are arranged in the inner cavity of sample seal；
B. the installation of sample：To system power supply, air supply system is closed, and the hot test stove is opposite opened
Furnace body, opposite opened furnace body are made of dynamic furnace body and static furnace body, and cylinder body extension 8 and piston extension 15 are each passed through up and down
Furnace wall is simultaneously slidably and sealingly connected with upper and lower furnace wall；
Opposite opened furnace body is rotated outward into opening, starts the lead screw loader 22 of densification mechanism, drives Universal-head 20, pressure
The piston 15.1 of sensor 19, pressure head 18 and specimen holder, which moves up, is detached from spill cylinder body 13, and is rotated to side, makes work
Plug 15.1 is far from spill cylinder body 13；The quick interface 3 of gas is opened, air supply system is detached with 10 pipeline of gas heater, is taken out upwards
It pulls out on the workbench outside the spill cylinder body 13 to furnace body of specimen holder, behind 13 inside of cleaning spill cylinder body, sample will be housed
12 sample seal is placed in the sample platform 12.1 of spill cylinder body 13；8 end of cylinder body extension is inserted into fast again
It on push-pull structure 7 and seals, measures, inspection enables 12 lower part pressure catheter port 6.1 of sample, at lower part thermometric end 5.1
At the 12 lower face positions 15-20mm of sample；The cantilever 21 for rotating densification mechanism, makes the piston 15.1 of specimen holder reach recessed
On the center line of the surface of shape cylinder body 13, start lead screw loader 22, so that piston 15.1 is entered in spill cylinder body 13 and compress
Sample seal, pressure sensor 19 measure and transmit pressing force to switch board 25 and computer 26, its pressing force is made to reach pre-
If value, and continue to keep, closed pair open type furnace body.
If have sample 12 that last time tested in spill cylinder body 13, the heat resisting steel test block that carries out high temperature airtight test,
Fine and close just ceramic test block or other closed structure material test blocks, should clean up, with 13 inside of hairbrush cleaning spill cylinder body and sample
Platform 12.1.The compression setup pressure value that characteristic and sample 12 according to enclosed material can be born, generally press maximum, force
Value is not more than 2000kN.During lead screw loader 22 pressurizes, since the compression of spill cylinder body 13 moves down, in pressure
Under effect, make the better tightness between cylinder body extension 8 and quick push-pull structure 7.
C. parameter typing：In computer 26, typing sample name：Carborundum plate, specifications and models：SIC2018, sample
Material：SIC95, specimen finish φ:75.1, thickness δ:25.2, quality G:295.5, density p:2.65, test temperature:1000, thoroughly
Manner predicted value, system according to input information above, automatically give pressing force, temperature increasing schedule, soaking time, gas supply gas
The gas flow of pressure, gas supply.
D. it runs：Start computer 26, is supplied water to gas cooler 16 equal by switch board 25；Computer 26 opens automatically
Dynamic heating system, 25 cabinets of control are powered according to computer instruction to electric furnace, and furnace temperature reaches preset temperature and open according to temperature programming
Begin to keep the temperature；Start air supply system gas supply, pressure regulation for gas supply valve, feed air temperature meter, supply gas pressure meter, the gas supply of gas measurement system 2
Flowmeter automatic measuring and controlling, the supply gas pressure P of gas measurement system 20, gas supply flow Q0, feed air temperature T0Control is passed through by computer 26
25 Automatic Detection and Control of cabinet processed；Gas reaches gas heater 10 through the quick interface 3 of gas, and trapezoidal cavity 28 is reached after heated
It is interior；12 lower surface gas pressure P of sample1, temperature T1Control is passed to after sample low pressure meter 6, lower part thermocouple 5 measure
Cabinet 25 is transferred to the display of computer 26 through switch board 25 and records；As the test temperature T of 12 lower surface of sample1, pressure P1Reach
After certain value, gas is passed through from 12 inside of sample, in the inverted trapezoidal cavity 27 for reaching 12 top of sample, is located at 12 top of sample heat
The 12 upper surface gas temperature T of sample that galvanic couple 17, upper pressure meter 14 will measure2, pressure P2Switch board 25 is passed to, through control
Cabinet 25 is transferred to computer 26 and is detected calculating；Into the gas in inverted trapezoidal cavity 27 air-turbocooler is reached through pressure head 18
Structure 16；High-temperature gas is discharged after the cooling of gas cooling mechanism 16 from babinet exhaust outlet 24.
In embodiment, under being acted in piston pressure, sample seal compressive deformation makes spill cylinder body 13 and examination
Better tightness between sample seal, sample 12 and sample seal can effectively prevent the position gas leakage contacted between each other,
So that measurement gas is penetrated among sample 12, improves the accuracy rate of measurement.
The gas flow surveying instrument used in gas measurement system 2 described in the utility model is controllable flow rate and defeated
Go out the sensor of electronic signal, such as：Mass flowmenter；Quick plug sealing material is graphitiferous fiber flexibility material；It is O-shaped close
Seal is made of silastic material.
Claims (8)
1. a kind of high temperature venting degree tester includes air supply system, hot test stove, specimen holder, gas heater, examination
Sample seal, densification mechanism, gas cooling mechanism, switch board, computer, it is characterized in that：The specimen holder includes resistance to
Piston made of hot material, spill cylinder body, the inverted trapezoidal cavity of piston internal upper part and the inner cavity of piston extension are connected together
Inverted trapezoidal cavity is formed, piston slide fit is in spill cylinder body；In spill cylinder body under the ladder cavity of lower part and spill cylinder base
The inner cavity of the cylinder body extension of side is connected together to form trapezoidal cavity, and the platform on trapezoidal cavity top is sample platform；Spill
Gas heater is equipped in cylinder wall, the gas heater is outside the helical duct being located in spill cylinder wall and spill cylinder body
The quick interface of gas, the helical duct gas outlet for being located at spill cylinder base is connected to ladder cavity, the quick interface of gas with
Air supply system unicom.
2. a kind of high temperature venting degree tester according to claim 1, it is characterized in that：The spill cylinder body, cylinder body prolong
It stretches pipe and when piston, piston extension are used cooperatively, center line is set point-blank.
3. a kind of high temperature venting degree tester according to claim 1, it is characterized in that：The heat proof material is that can bear
1000 DEG C or more of High-temperature resistant alloy material or inorganic non-metallic material.
4. a kind of high temperature venting degree tester according to claim 1, it is characterized in that：The densification mechanism includes machine
Seat, the support column being fixed on engine base, the cantilever for being connected to upper end of support column；The lead screw loader lower end being located on cantilever is downward
It is connected with Universal-head, pressure sensor, pressure head, piston extension in turn；Pressure sensor is connect with switch board；It is described in machine
It is fixed with quick push-pull structure on seat, it is interior to be equipped with plug sealing material and end face O-ring seal, quick push-pull structure and spill
Cylinder body extension lower end is tightly connected.
5. a kind of high temperature venting degree tester according to claim 4, it is characterized in that：Described is located inside trapezoidal cavity
Sample lower part be provided with low pressure meter and lower part thermocouple, with quick push-pull structure be tightly connected after with switch board connect
It connects, the pressure catheter port of low pressure meter and the thermometric end of lower part thermocouple are located at away from the 15-20mm of sample lower face；If
Sample upper pressure meter inside inverted trapezoidal cavity and upper thermocouple are connect across piston extension upper end with switch board；
The thermometric end of upper thermocouple and the pressure catheter port of upper pressure meter, are located at away from the 15-20mm of sample upper surface.
6. a kind of high temperature venting degree tester according to claim 1, it is characterized in that：The gas cooling mechanism is by solid
The heat dissipation tank that is scheduled on outside pressure head and the spiral radiator being located in heat dissipation tank composition, one end of spiral radiator and are located at heat dissipation tank
On the connection of babinet exhaust outlet, the inner cavity of the other end and piston extension penetrates through, sample upper thermocouple and upper pressure meter with
Piston has enough gaps between extending inside pipe wall, and flowing cooling water is equipped in heat dissipation tank.
7. a kind of high temperature venting degree tester according to claim 1, it is characterized in that：The sample seal is by resistance to height
Temperature has platform-like body made of the nonmetallic materials of densification, appearance and size and spill cylinder body inside dimension joint match, interior
Size and sample joint match, platform-like body are made of platform body and upper lower gasket, and platform body is located between lower gasket,
Platform body is consistent with upper lower gasket appearance and size, highly be less than spill height of cylinder, shape be torus, polygonal body or
Ellipsoid body.
8. a kind of high temperature venting degree tester according to claim 1, it is characterised in that：The sample seal is by resistance to height
There is temperature step-like body made of the nonmetallic materials of densification, step-like body to be buckled togather by upper seal and lower seal
Composition, appearance and size is matched with spill cylinder body inside dimension coincide, and inside dimension and sample joint match are highly less than spill cylinder body
Highly, shape is torus, polygonal body or ellipsoid body.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432887A (en) * | 2020-11-10 | 2021-03-02 | 海鹰企业集团有限责任公司 | Method for testing water vapor transmission rate of high polymer material under pressure condition |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112432887A (en) * | 2020-11-10 | 2021-03-02 | 海鹰企业集团有限责任公司 | Method for testing water vapor transmission rate of high polymer material under pressure condition |
| CN112432887B (en) * | 2020-11-10 | 2022-11-11 | 海鹰企业集团有限责任公司 | Method for testing water vapor transmission rate of high polymer material under pressure condition |
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