CN105299439B - Detachable low-temperature flow shear stress form, device and container - Google Patents
Detachable low-temperature flow shear stress form, device and container Download PDFInfo
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- CN105299439B CN105299439B CN201510590914.2A CN201510590914A CN105299439B CN 105299439 B CN105299439 B CN 105299439B CN 201510590914 A CN201510590914 A CN 201510590914A CN 105299439 B CN105299439 B CN 105299439B
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Abstract
The invention discloses a kind of detachable low-temperature flow shear stress forms, and including outer tube, inner tube and transparent panel, the transparent panel by removably is compressed and is fixed on inner tube one end by the outer tube, and by inner tube, the end seal is blocked up；The coefficient of thermal expansion of the outer tube is respectively greater than the coefficient of thermal expansion of inner tube and transparent panel；The shrinkage of the outer tube is more than the sum of inner tube and the shrinkage of transparent panel under low temperature, ensures that transparent panel and inner tube one end are further fitted close by outer tube.The invention also discloses a kind of cryogen visualization device using above-mentioned visualization form and the cryogenic liquid vessels with liquid level overview function.It is easy to connect between the transparent panel of the present invention and inner tube, outer tube, the function of automatic-sealed can be realized under the temperature change of cryogen guiding；It is threadedly coupled and so that device is detachable, be conveniently replaceable transparent glass, improve the service life of device.Whole device is simple in structure, the observation and research of phenomena such as boiling convenient for cryogen.
Description
Technical field
It can the present invention relates to technical field of aerospace and refrigeration cryogenic engineering more particularly to a kind of detachable low-temperature fluid
Depending on changing form and visualization device and cryogenic liquid vessel.
Background technology
In technical field of aerospace and refrigeration cryogenic engineering, liquefied natural gas, liquid nitrogen, liquid oxygen and liquid hydrogen etc. obtain extensively
Use, liquefaction fractionation, transport and the storage of these substances be required for using a large amount of Cryo Equipment, the performance of these equipment and
Reliability directly affects safety and the economical operation of related complete set of equipments.If the main condenser in air separation unit is to make lower tower top
Portion's nitrogen condensation, upper tower bottom liquid oxygen evaporation rise the device of steam to provide lower tower phegma and upper tower, generally use plate wing
Formula heat exchanger, heat transfer temperature difference often reduce 0.5K, and a whole set of air separation unit energy consumption can decline 2.46%.Therefore, in heat exchanging device
The liquid-gas phase transition in portion and the further investigation of heat-transfer mechanism have great importance.
Due to cryogen, such as liquid nitrogen, liquid oxygen and liquid hydrogen temperature less than 120K, during its boiling mechanism of experimental study,
It needing it with external environs to prevent external heat conduction interference experiment phenomenon, common method is to use vacuum insulation interlayer,
It is 10 in vacuum degree-3During Pa, gas molecule heat conduction can be neglected.In addition, understanding of the image of boiling process to boiling mechanism
It is of crucial importance, usual way is that two forms are filled on the tube wall of vacuum interlayer both sides, and a form is room temperature
Form, side ingress of air, opposite side are vacuum interlayer；Another form is known as low temperature form, a side contacts cryogen,
Opposite side is vacuum.By the two forms, the boiling process of liquid internal directly can be observed and shot.Room temperature form is using general
Logical bolt and O-ring sealing means can ensure not leak.And for low temperature form, if traditional O-ring sealing and flange
Fitted bolt sealing means, due to the influence (material under such as low temperature to material property of expand with heat and contract with cold effect and low temperature of material
Become fragile), which sealing effect is poor or even fails.In order to solve the sealing problem of low temperature form, primarily now using two
Kind method.A kind of method is to use copper packing as gasket, but needs copper packing uniform force, installation requirement when being compacted
Higher, success rate is relatively low, while copper packing is used only once, and cost is higher.Second method be directly by quartz glass with not
Rust steel pipe is welded by kovar, although this method energy excellent sealing, yield rate is low, expensive and transparent in manufacturing process
The other materials that material cannot use organic glass equal strength stronger than quartz glass limits its use model under high pressures
It encloses.
It is a kind of convenient for disconnecting and having at low temperature the low temperature form of good seal performance therefore, it is necessary to design, it can
Efficiently and quickly with other structures it is integrated into the observation and research that low temperature test device carries out cryogen boiling phenomenon.
Current low temperature form is primarily present following problem：
1st, existing transparency window is generally fixed using flange arrangement, and installation replacement is difficult, structure is generally complex, and only
It can be used to a certain specific place use, not have generality；
2nd, the leakproofness of transparency window hardly results in guarantee, and certain structures are to transparency window heat transfer property in itself and mechanical strength
It there are certain requirements, this selection to transparency window material also greatly limited；
If the 3, transparency window is cylindrical structure, since transparency window side wall is thicker, refraction effect can be generated, to observing result shadow
Sound is larger.
Invention content
The present invention provides a kind of detachable low-temperature flow shear stress form, inner and outer tubes are consolidated using removably
It is fixed, under low temperature can automatic-sealed, installation is replaced convenient；It will be transparent using the hot expansibility difference between inner and outer pipes simultaneously
Plate and inner pipe end axial seal.
The present invention also provides a kind of cryogen visualization devices using above-mentioned visualization form.
Invention also provides a kind of appearances of the cryogenic liquid with liquid level overview function using above-mentioned visualization form
Device.
A kind of detachable low-temperature flow shear stress form, including outer tube, inner tube and transparent panel, the outer tube passes through detachable
The transparent panel is compressed and is fixed on inner tube one end by mode, and by inner tube, the end seal is blocked up；The coefficient of thermal expansion of the outer tube is more than interior
The sum of coefficient of thermal expansion of pipe and transparent panel；The coefficient of thermal expansion of the outer tube is respectively greater than the thermal expansion system of inner tube and transparent panel
Number；The shrinkage of the outer tube is more than the sum of inner tube and the shrinkage of transparent panel under low temperature, ensures outer tube by transparent panel and inner tube
One end is further fitted close.
In the present invention, the coefficient of thermal expansion of the outer tube is more than the sum of coefficient of thermal expansion of inner tube and transparent panel, ensures low
Wen Shi, outer tube have the retraction stroke of bigger, by glass plate tightly be pressed on inner tube one end, one end of inner tube is closed；Temperature
When degree is increased to room temperature, outer tube has the expansion stroke of bigger, ensures being smoothly detached for inner and outer tubes.The inner tube other end with it is low
Warm fluid container is connected.Technical scheme of the present invention is selected, the coefficient of thermal expansion of transparent panel is not required to be centainly less than the heat of outer tube
The coefficient of expansion increases the selection space of transparent panel, reduce detachable low-temperature flow shear stress form manufacture difficulty and into
This.Certainly as further preferably, the coefficient of thermal expansion of the outer tube is more than inner tube and any individual thermal expansion system of transparent panel
Number.During using the technical solution, sealing function of the outer tube to inner tube is further enhanced.In addition, the mistake of sealing is realized under low temperature
Cheng Zhong, transparent panel axially realize the sealing to inner tube from inner tube, transparent plate thickness etc. are not strict with.
Under room temperature, by the active force of outer tube, it can be achieved that general sealing to inner tube；It is close that high intensity can be achieved under low temperature
Envelope, the principle of low-temperature condition sealing of the present invention are that coefficient of thermal expansion is different under same low temperature environment according to two kinds of different materials,
The high material of coefficient of thermal expansion is set in the low surrounding materials of coefficient of thermal expansion, even if existing between two kinds of materials at normal temperatures
Gap, but since the high material shrinkage of coefficient of thermal expansion is more than the small material of coefficient of thermal expansion, so two kinds of materials in low temperature
Gap between material is eliminated, and can achieve the purpose that realize automatic high-intensity sealing under low temperature.The present invention's is detachable low
Warm flow shear stress viewing device solves the problems, such as that low temperature form poor sealing has leakage on vacuum interlayer tube wall.
The transparent panel is related with the material of transparent panel, inner and outer tubes to the gap of inner and outer tubes, at the same with experiment
When cryogen temperature it is related.In order to ensure that device has higher sealing performance, should make between transparent panel and inner tube, outer tube
Gap it is small as possible, difference of the inner and outer tubes on coefficient of thermal expansion is big as possible.
Preferably, the transparent panel is transparency glass plate, material is quartz glass, and said inner tube is stainless steel tube,
The outer tube is plastic tube or lucite tube, and plastic material is fluoroplastics, polytrifluorochloroethylene etc..
Preferably, said inner tube outer wall be equipped with external screw thread, the outer tube be equipped with the external screw thread cooperation in
Screw thread.Said inner tube is inserted into outer tube；The transparent glass is embedded between outer tube and inner pipe end.Pass through the precession and rotation of screw thread
Go out, the assembly or disassembly between inner and outer tubes is realized, so as to easily replace transparent panel.Meanwhile using threaded connection
Help to increase the frictional force between inner and outer pipes, prevent the pipe caused by pipe external and internal pressure difference from coming off and loosening, screw thread
In the presence of also having the function of clearance seal.
In order to fix position that transparent glass connects with inner tube, outer tube and further enhance sealing effect, preferably, institute
Inner tube one end is stated equipped with the limiting slot with the transparent panel shape adaptation.The limiting slot forms transparent panel semi-surrounding structure, limit
Position slot inner wall and bottom surface are abutted with the side of transparent panel and periphery.Described outer tube one end diameter is inwardly vertically bent to form spacing ring,
The spacing ring, which compresses glass plate, is fixed on inner tube one end.
There are gap between said inner tube end face and outer tube spacing ring inner wall, not in contact with.When temperature be down to from room temperature it is low
Wen Shi, since the coefficient of thermal expansion of outer tube material is significantly greater than inner tube and transparent glass, outer tube is in contraction axially and radially
Amount is bigger than inner tube and transparent panel so that the inner surface of outer tube and the outer surface of inner tube fit closely, outer spacing ring and transparent panel
It fits closely, forms effectively sealing.In order to ensure the self sealss effect under low temperature, it should ensure as possible limiting slot and spacing ring with
This area that transparent glass contacts with each other is sufficiently large.
In order to further enhance the sealing performance between transparent glass and inner and outer tubes, it is preferable that said inner tube, outer tube
And transparent panel contacts with each other and is filled partially with low temperature seal fat.Stop-leak compound can cure at low temperature, so as to play the role of sealing.
Melt under room temperature, so as to so that transparent glass and inner tube and outer tube are easy to disassemble.Stop-leak compound is disposable, is replaced every time
Stop-leak compound will be refilled before being installed after transparent glass.
Preferably, sealing ring is equipped between said inner tube or outer tube and transparent panel.At this time can be as needed, add sealing
The structures such as slot, in order to the fixation of sealing ring, low temperature resistant O-ring etc. may be selected in sealing ring.
Preferably, the outer tube is equipped with spanner card interface.Square or hexagon may be selected in spanner card interface, just
It is mounted and dismounted in spanner.
For the ease of the detachable low-temperature flow shear stress form is observed the cryogens such as liquid nitrogen or liquid hydrogen
Boiling scene, self sealss can be realized when cryogens by liquid nitrogen or liquid hydrogen, preferably, the low temperature refers to temperature as 230K
Below.
The present invention also provides a kind of cryogen visualization device, including carrying the inner wall of vacuum interlayer structure and outer
Wall and the photographic equipment for acquiring fluid state information, inner wall surround the space for holding cryogen, are set on the inner wall
There is low temperature form, the outer wall is equipped with room temperature form, and low temperature form, room temperature form and picture pick-up device align, described
Low temperature form is the detachable low-temperature flow shear stress form described in any of the above-described technical solution.
Also a kind of cryogenic liquid vessel with liquid level overview function of the present invention, the inner wall including carrying vacuum interlayer structure
And outer wall, inner wall surround the space for holding cryogen, the inner and outer wall is respectively equipped with close to the position of bottom and top
Opening；
Double-layer flexible pipe is further included, the outer tube of Double-layer flexible pipe seals respectively with the opening at the top and bottom of outer wall to be fixed,
The inner tube of Double-layer flexible pipe seals with the opening at the top and bottom of inner wall fix respectively；
Said inner tube is equipped with low temperature form, and the outer tube is equipped with low temperature form to positive room temperature form, described low
Warm form is the detachable low-temperature flow shear stress form described in any of the above-described technical solution.
The beneficial effects of the present invention are：It is easy to connect between transparent panel and inner tube, outer tube, and draw in cryogen
The function of automatic-sealed can be realized under the temperature change led；It is further enhanced by designs such as stop-leak compound, limiting slot, spacing rings
Sealing effect；It is threadedly coupled and so that device is detachable, be conveniently replaceable transparent glass, improve the service life of device.Whole device
It is simple in structure, the observation and research of phenomena such as boiling convenient for cryogen.
Description of the drawings
Fig. 1 is the internal structure schematic diagram of the detachable low-temperature flow shear stress form of the present invention.
Fig. 2 is the liquid-nitrogen boiling visualization device schematic diagram using the detachable low-temperature flow shear stress form of the present invention.
Fig. 3 is the cryogenic liquid with liquid level overview function using the detachable low-temperature flow shear stress form of the present invention
Container schematic diagram.
Specific embodiment
With reference to specific embodiment, the invention will be further described.Noun of locality "left", "right" of the present invention be with
On the basis of attached drawing 1, the use of the noun of locality does not limit the present invention, only for the purposes of describing and distinguishing.
As shown in Figure 1, a kind of detachable low-temperature flow shear stress viewing device, including sequentially connected inner tube 1, outer tube 2
With transparent glass 3.Outer tube 2 is set in the periphery of inner tube 1, is connected by helicitic texture.Outer tube 2 be tubular structure, 2 one end of outer tube
It extends radially inwardly, forms the spacing ring c positioned at end, spacing ring c internal diameters are less than the diameter of transparent glass 3；Inner tube 1 is tubular
Structure, the end face of 1 one end of inner tube are equipped with the limiting slot b being recessed inwardly.The generally pylindrical grooves of limiting slot b.Limiting slot b is used for
Transparent glass 3, the shape adaptation with transparent glass 3 are accommodated, limiting slot b slot bottoms and the left side of transparent glass 3 abut against, and limit
Slot b side walls and 3 outer peripheral edge of transparent glass against；The left surface of spacing ring c and the right side of transparent glass 3 abut against, transparent glass
Glass 3 by limiting slot b and spacing ring c be fixed on inner tube 1, outer tube 2 end between.Cryogen is contained in inner tube 1, such as
Liquid nitrogen etc., 1 one end of inner tube are fixed with outer tube 2, and the other end is connected or is wholely set with liquid nitrogen apparatus for placing.The low temperature such as liquid nitrogen
Fluid 4 is full of inner tube 1, and the flow phenomenon of cryogen can be observed through transparent glass 3.Inner tube 1 and 2 fixed end of outer tube
Outer surface be machined with external screw thread A, 2 inner surface of outer tube is machined with internal thread a, and inner tube 1, outer tube 2 are respectively by external screw thread A and interior
Screw thread a, which is realized, to be threadedly coupled, and facilitates inner tube, outer tube dismounting and change transparent glass；Meanwhile contributed in increase using threaded connection
Frictional force between outer tube prevents the pipe caused by pipe external and internal pressure difference from coming off and loosening, between the presence of screw thread also has
The effect of gap sealing.Transparent glass 3, limiting slot b, spacing ring c are in contact and are filled partially with stop-leak compound, further enhance sealing effect
Fruit.
As a kind of further preferred scheme, also can the position that transparent glass 3 is contacted with inner tube (such as) setting is close
Seal, such as O-ring etc. can be set.
Preferably, the material of transparent glass 3 is quartz glass, the material of inner tube 1 is stainless steel, and the material of outer tube 2 is
Fluoroplastics, polytrifluorochloroethylene or organic glass.The coefficient of thermal expansion of outer tube 2 is more than the coefficient of thermal expansion of inner tube 1, reduces identical
Temperature when, axial or radially, the shrinkage of outer tube 2 is more than inner tube 1 and the shrinkage of transparent glass 3, so as to by
Transparent glass axial compression is fixed, and plays sealing effect.Since transparent glass 3 uses axial seal, so to transparent glass 3
Thickness be not strict with.During room temperature (25 DEG C), between transparent glass 3 and inner tube 1 and outer tube 2 there is certain interval, be convenient for
Dismounting；During low temperature (such as -196 DEG C of liquid nitrogen temperature), outer tube 2 is closely wrapped in the outer wall of inner tube 1, spacing ring c left sides with
3 right side of transparent glass is in close contact, and forms sealing.Simultaneously in inner tube 1 Fluid pressure can also further enhance transparent glass 3 with
Sealing function between outer tube 2.And when the temperature increases, outer tube 2 can separate again with inner tube 1 and transparent glass 3.It is recited above
Temperature change comes from cryogen, that is, after inner tube is filled with cryogen, and outer tube 2, inner tube 1 and transparent glass 3 are mutual
Between realize automatic-sealed, after experiment, outer tube 2 and inner tube 1 and transparent glass realize automatic unclamp.
Specific embodiment 2
As shown in Fig. 2, the liquid-nitrogen boiling visualization device schematic diagram to use the present invention, for observing liquid nitrogen in not equality of temperature
Fluidized state under degree.Liquid-nitrogen boiling visualization device includes carrying the Dewar bottle of form and for shooting liquid-nitrogen boiling phenomenon
Picture pick-up device.Dewar bottle inside and outside wall is respectively provided with a form, equipped with low temperature form 21, outer wall wherein on 27 a certain position of inner wall
The position identical with inner wall 27 is equipped with room temperature form 22 on 28.22 side ingress of air of room temperature form, opposite side is vacuum interlayer
24；21 1 side contacts cryogen of low temperature form, opposite side are vacuum interlayer 24.By the two forms, can directly observe and
Shoot the boiling process inside liquid nitrogen.Room temperature form 22 can ensure not leak using common bolt and O-ring sealing means, can
Using existing material and structure.Low temperature form 21 is using the detachable low-temperature flow shear stress disclosed in the embodiment of the present invention 1
Form.It is vacuum interlayer 24 between inside and outside wall, anti-leak-stopping heat.Liquid nitrogen 26 equipped with progress liquid-nitrogen boiling experiment in Dewar bottle,
Electric heater unit 25 is equipped in liquid nitrogen 26.It is equipped with the photographic equipment 23 of a shooting liquid-nitrogen boiling phenomenon, the equipment face at a distance
It low temperature form 21 and room temperature form 22 and at a distance of suitable distance, and same water is in low temperature form 21, room temperature form 22
Flat height.
Electric heater unit 25 gives the liquid nitrogen heating in Dewar bottle, makes liquid nitrogen that boiling phenomenon occur.Photographic equipment 23 is through normal
Warm form 22 and low temperature form 21 can observe and record the boiling phenomenon of liquid nitrogen in Dewar bottle, while according to being set for taking pictures
Storage.
When carrying out liquid-nitrogen boiling experiment, (25 DEG C) install low temperature form 21 respectively on the inside and outside wall of Dewar bottle under room temperature
With room temperature form 22.Room temperature form 22 uses common bolt and O-ring sealing means, is sealed under room temperature and low temperature good.
Low temperature form 21 uses detachable low-temperature flow shear stress form of the present invention, carries out general sealing by screw thread under room temperature.
In Dewar bottle add in liquid nitrogen after, inner wall temperature drastically declines, due to outer tube coefficient of thermal expansion be more than inner tube and
The coefficient of thermal expansion of transparent glass, the shrinkage of outer tube are more than inner tube and the shrinkage of transparent glass, and outer tube is axially and radially
The outer wall of inner tube is shunk and be closely wrapped in, while is in the axial direction fixed transparent glass, and play sealing effect.Cause
This low temperature form 21 carries out general sealing at normal temperatures, carries out enhancing sealing automatically at low temperature.Electric heater unit 25 is to Du
Liquid nitrogen heating in watt bottle, makes liquid nitrogen that boiling phenomenon occur.Photographic equipment 23 can be with through room temperature form 22 and low temperature form 21
Observe and record the boiling phenomenon of liquid nitrogen in Dewar bottle.
After liquid-nitrogen boiling is tested, the liquid nitrogen in Dewar bottle is taken out, inner wall temperature increases rapidly, until room temperature.Due to
It expands with heat and contract with cold phenomenon, the outer tube and inner tube of low temperature form 21 unclamp automatically, come back to the state generally sealed.Outer tube and inner tube
Between be to be threadedly coupled, replace the transparent glass of low temperature form 21 if necessary at this time, can outer tube be made from inner tube with turn outer tube
Surrounding disassembles, and transparent glass is replaced, for testing use next time.
Low temperature form 21, room temperature form 22 and photographic equipment 23 are in same level.Pass through regarding by transparent glass
Window can observe the boiling phenomenon that fluid occurs in Dewar bottle.Since vacuum chamber is in the periphery of low temperature form 21, extraneous temperature
Fluid boiling in Dewar bottle will not be had an impact.
Specific embodiment 3
As shown in figure 3, the cryogenic liquid vessel with liquid level overview function to use the present invention, this device can be used as one
Low-temp. liquid-level meter is planted to use, for observing the liquid level in cryogenic liquid vessel.Cryogenic liquid with liquid level overview function holds
Metal hose 38 of the device device by cryogenic liquid vessel 39 and with visualization form forms.Cryogenic liquid vessel 39 has inner wall
39a and two layers of outer wall 39b is vacuum interlayer 37 between inside and outside wall, to reduce leakage heat.Cryogenic liquid 36 is housed in liquid container.
Cryogenic liquid vessel 39 is respectively equipped with exhaust outlet 31, liquid in-out mouth 32 and vacuum pumping port 33.The bottom end of liquid in-out mouth 32 is close to low
Geothermal liquid container bottom, the cryogenic liquid 36 for being added in or being discharged in cryogenic liquid vessel by liquid in-out mouth 32 is so as to change liquid
The height of cryogenic liquid in container.Gas in cryogenic liquid vessel is discharged by exhaust outlet 31, cryogenic liquid can be controlled to hold
Pressure in device.Vacuum pumping port 33 is used to vacuumize cryogenic liquid vessel between inside and outside wall, in guarantee cryogenic liquid vessel,
Vacuum degree between outer wall reduces the leakage heat of system to the greatest extent.Exhaust outlet 31, liquid in-out mouth 32 and vacuum-evacuate 33 opening and closing and open
Size is spent to be controlled by valve thereon respectively.In a certain height of the cryogenic liquid vessel close to bottleneck and a certain height close to bottom of bottle
Degree is respectively equipped with opening, and two opening double-level-metal hoses 38 are connected and are connected.The outer tube 38b of double-level-metal hose 38 and low
Geothermal liquid container outer wall 39b is connected, and the inner tube 38a of metal hose 38 is connected with the inner wall 39a of cryogenic liquid vessel.Metal hose
Inner tube 38a diameter very littles, liquid volume therein compare liquid container in liquid volume can be neglected.Therefore inner tube 38a
Influence of the presence of middle partially liq to liquid level in cryogenic liquid vessel can also ignore.In the outer of metal hose 38
Low temperature form 34 is housed equipped with room temperature form 35, the inner tube corresponding section of metal hose 38 on pipe 38b certains.Room temperature form 35
Side ingress of air, opposite side are vacuum interlayer 37；34 1 side contacts cryogenic liquid of low temperature form, opposite side is vacuum interlayer
37.By the two forms, the liquid level of cryogenic liquid can be directly observed.Room temperature form 35 is using common bolt and O-shaped
Circle sealing means can ensure not leak.Low temperature form 34 is using detachable low-temperature flow shear stress disclosed in the embodiment of the present invention 1
Form.By room temperature form 35 and low temperature form 34, human eye can directly observe the liquid level in cryogenic liquid vessel, and
Cryogenic liquid vessel good seal, liquid level stabilizing.
When adding in through liquid in-out mouth 32 or discharging liquid, the liquid level in liquid container changes, can be upper and lower
Mobile metal hose 38 changes the height of detachable low-temperature flow shear stress form to observe liquid level position.If through disengaging
When liquid mouth 32 adds in cryogenic liquid, liquid level raising, slowly moves up metal hose 38, makes detachable low-temperature stream in liquid container
The position of volume visualization form gradually rises, until it is observed that liquid level position in form；If it is discharged through liquid in-out mouth 32 low
During geothermal liquid, liquid level reduces in liquid container, slowly moves down metal hose 38, makes detachable low-temperature flow shear stress form
Position continuously decrease, until it is observed that liquid level position in form.
When carrying out fluids at low temperatures experiment, (25 DEG C) on the inside and outside wall of liquid container install low temperature and regard respectively under room temperature
Window 34 and room temperature form 35.Room temperature form 35 uses common bolt and O-ring sealing means, is sealed under room temperature and low temperature good
It is good.Low temperature form 34 uses detachable low-temperature flow shear stress form of the present invention, and it is general close that realization is threadably secured under room temperature
Envelope.
After adding in cryogenic liquid in liquid container, inner wall temperature drastically declines, due to the thermal expansion of low temperature form outer tube
Coefficient is more than the coefficient of thermal expansion of inner tube, and the shrinkage of outer tube is more than the shrinkage of inner tube, and outer tube is closely wrapped in inner tube
Outer wall, so as to be fixed transparent glass, and play sealing effect.Therefore low temperature form 34 at normal temperatures cannot be effectively close
It seals, at low temperature automatic-sealed.The position of metal hose 38 is moved up and down, changes the position of detachable low-temperature flow shear stress form
It puts, it is observed that the liquid level position in liquid container.
After fluids at low temperatures is tested, the cryogenic liquid in liquid container is taken out, inner wall temperature increases rapidly, until often
Temperature.Due to phenomenon of expanding with heat and contract with cold, the outer tube and inner tube of low temperature form 34 unclamp automatically, come back to the state that cannot be sealed.It is low
It is to be threadedly coupled between the outer tube and inner tube of warm form 34, replaces the transparent glass of low temperature form 34 if necessary at this time, it can be with
Turn outer tube, makes outer tube be disassembled around inner tube, transparent glass is replaced, for testing use next time.
The detachable low-temperature flow shear stress viewing device of the present invention can be from different liquid-supplying system (such as liquid nitrogen, liquid oxygen, liquid
Hydrogen, liquid helium etc.) it is coupled, the scope of application is big, simple in structure.Simultaneously as detachable low-temperature flow shear stress viewing device
Fluid circuit on without installing valve additional, the shadow that be generated to fluid boiling of energy loss can be generated to avoid fluid flow through valve door
It rings.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, that is made any repaiies
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
- A kind of 1. detachable low-temperature flow shear stress form, including outer tube, inner tube and transparent panel, which is characterized in that the outer tube The transparent panel is compressed by removably and is fixed on inner tube one end, the end seal is blocked up by inner tube；The thermal expansion of the outer tube Coefficient is respectively greater than the coefficient of thermal expansion of inner tube and transparent panel；The shrinkage of the outer tube is more than inner tube and transparent panel under low temperature The sum of shrinkage ensures that transparent panel and inner tube one end are further fitted close by outer tube.
- 2. detachable low-temperature flow shear stress form according to claim 1, which is characterized in that said inner tube outer wall is equipped with External screw thread, the outer tube are equipped with the internal thread coordinated with the external screw thread.
- 3. detachable low-temperature flow shear stress form according to claim 1, which is characterized in that said inner tube one end is equipped with With the limiting slot of the transparent panel shape adaptation.
- 4. the detachable low-temperature flow shear stress form according to claim 1 or 3, which is characterized in that described outer tube one end Diameter is inwardly vertically bent to form spacing ring, which, which compresses transparent panel, is fixed on inner tube one end.
- 5. detachable low-temperature flow shear stress form according to claim 1, which is characterized in that said inner tube, outer tube and Transparent panel, which contacts with each other, is filled partially with low temperature seal fat.
- 6. detachable low-temperature flow shear stress form according to claim 1, which is characterized in that said inner tube or outer tube with Sealing ring is equipped between transparent panel.
- 7. detachable low-temperature flow shear stress form according to claim 1, which is characterized in that the outer tube is equipped with and pulls Hand card interface.
- 8. detachable low-temperature flow shear stress form according to claim 1, which is characterized in that said inner tube is stainless steel Pipe, the outer tube are plastic tube or lucite tube；The transparent panel is transparency glass plate.
- 9. a kind of cryogen visualization device, including carrying the inner and outer wall of vacuum interlayer structure and being flowed for acquiring The photographic equipment of body status information, inner wall surround the space for holding cryogen, which is characterized in that the inner wall is equipped with low temperature Form, the outer wall are equipped with room temperature form, and low temperature form, room temperature form and picture pick-up device align, and the low temperature regards Window is any detachable low-temperature flow shear stress forms of claim 1-8.
- 10. a kind of cryogenic liquid vessel with liquid level overview function, the inner and outer wall including carrying vacuum interlayer structure is interior Wall surrounds the space for holding cryogen, which is characterized in that the inner and outer wall is set respectively close to the position of bottom and top There is opening；Double-layer flexible pipe is further included, the outer tube of Double-layer flexible pipe seals respectively with the opening at the top and bottom of outer wall to be fixed, double-deck The inner tube of flexible pipe seals with the opening at the top and bottom of inner wall fix respectively；Said inner tube is equipped with low temperature form, and the outer tube is equipped with low temperature form to positive room temperature form, and the low temperature regards Window is any detachable low-temperature flow shear stress forms of claim 1-8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510590914.2A CN105299439B (en) | 2015-09-16 | 2015-09-16 | Detachable low-temperature flow shear stress form, device and container |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510590914.2A CN105299439B (en) | 2015-09-16 | 2015-09-16 | Detachable low-temperature flow shear stress form, device and container |
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| Publication Number | Publication Date |
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| CN105299439A CN105299439A (en) | 2016-02-03 |
| CN105299439B true CN105299439B (en) | 2018-06-19 |
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|---|---|---|---|---|
| JP6417496B1 (en) * | 2017-02-15 | 2018-11-07 | 日東工器株式会社 | Pipe member |
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