CN207300756U - A kind of liquid nitrogen cooling device suitable for low-temperature dynamic experiment of machanics - Google Patents
A kind of liquid nitrogen cooling device suitable for low-temperature dynamic experiment of machanics Download PDFInfo
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- CN207300756U CN207300756U CN201721215629.3U CN201721215629U CN207300756U CN 207300756 U CN207300756 U CN 207300756U CN 201721215629 U CN201721215629 U CN 201721215629U CN 207300756 U CN207300756 U CN 207300756U
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- inner casing
- shell
- cover plate
- casing
- liquid nitrogen
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Abstract
A kind of liquid nitrogen cooling device suitable for low-temperature dynamic experiment of machanics, including inner casing, shell, inner cover plate, outer cover plate, thermal insulation board, two connection bolts, two nuts, insulation plug, casing, fan, several cool guiding blocks and three thermometers；Inner casing and shell are the cuboid of end-cover-free, and inner casing is set inside the shell, accompanies air layer between the two；A first through hole through inner casing and shell is respectively equipped with two faces center of inner casing and shell area minimum, two connection bolts are separately positioned in the first through hole at both ends；The connection bolt is equipped with second through hole along its center axis, and connection bolt head is stuck in the outside wall surface of shell, and screw rod stretches into inner casing, and is fastened with nut, and the internal face of inner casing is stuck in after nut tightening, and inner cover plate is arranged in inner casing, and is located at nut top surface；Compared with prior art, its remarkable advantage is the utility model：（1）It is simple in structure, it is swift to operate, it is economical and practical；（2）Operating ambient temperature is not limited.
Description
Technical field
The utility model belongs to mechanics of materials field, and in particular to a kind of liquid nitrogen suitable for low-temperature dynamic experiment of machanics is cold
But device.
Background technology
In modern industrial society, the application of composite material and polymer is inseparable with human progress development, is related to aviation
The energy substance exploitation of space flight, the numerous areas such as the expansion of mechanical structure assembly property and biological tissue's injury repair.It is and compound
The Research of dynamic mechanical of material and polymer at various temperatures is the theoretical foundation of the above subject.Although industrial constant-temperature case
It can realize the heating and cooling to material test specimen, but itself and material dynamic mechanical performance testing device --- Hopkinson leverage
Unite incompatible, that is, treat that test specimen is maintained at target temperature and takes out after a certain period of time and be sandwiched in again between incident bar and transmission bar.Cross herein
Cheng Zhong, test specimen inevitably have temperature change, and error is brought to test result, thus the Hopkinson lever system comprising high-low temperature chamber carries
Go out.
At present, high-temperature cabinet is easier to realize, whether mainly work using ceramic heating flake uniformly distributed in temperature control circuit regulating box
The temperature inside the box is set to be maintained at desired value for a long time.Some cryogenic boxes utilize space in semiconductor chilling plate cooler bin, but its shortcoming
One of be to environment temperature require it is harsh, when environment temperature is higher than a certain value, can not freeze；Two be that achievable low temperature has
Lower limit, is not used to Overall Acquisition material at low temperature dynamic mechanical data.The cryogenic box separately having is using liquid nitrogen as low-temperature receiver cooler bin
Interior space, but it is complicated, and device is huge, using limited.
The content of the invention
The purpose of this utility model is to provide a kind of liquid nitrogen cooling device suitable for low-temperature dynamic experiment of machanics, solves
Existing temp enclosure with liquefied nitrogen and Semiconductors At Low Temperatures case application limitation problem, is established for the further popularization of low-temperature dynamic experiment of machanics
Technical foundation.
The technical solution for realizing the utility model aim is：A kind of liquid nitrogen suitable for low-temperature dynamic experiment of machanics is cold
But device, including inner casing, shell, inner cover plate, outer cover plate, thermal insulation board, two connection bolt, two nuts, insulation plug, casing,
Fan, several cool guiding blocks and three thermometers；Inner casing and shell are the cuboid of end-cover-free, and inner casing is set inside the shell,
Air layer is accompanied between the two；One, which is respectively equipped with, at two faces center of inner casing and shell area minimum runs through inner casing and shell
First through hole, two connection bolts be separately positioned in the first through hole at both ends；The connection bolt is set along its center axis
There is second through hole, connection bolt head is stuck in the outside wall surface of shell, and screw rod stretches into inner casing, and is fastened with nut, nut rotation
Next internal face for being stuck in inner casing, inner cover plate are arranged in inner casing, and are located at nut top surface；Outer cover plate is arranged on the uncovered of inner casing
Top surface is held, is contacted with outer casing inner wall；Thermal insulation board is filled between inner cover plate and outer cover plate, and thermal insulation board is sticked on outer cover plate；Inside
A circular liquid nitrogen inlet is provided with any one angle of cover board；Hopkinson incident bar connects the second of bolt from one
Through hole stretches into inner casing and withstands test specimen to be measured, and the second through hole of Hopkinson transmission bar from another connection bolt stretches into inner casing and withstands
Test specimen to be measured, casing is by Hopkinson incident bar test specimen end closely to be measured, Hopkinson transmission bar test specimen end closely to be measured and to be tested
Part wraps up, and three thermometers are uniformly distributed circumferentially the outer wall in casing；Several cool guiding blocks are arranged on inner casing bottom surface, and fan is solid
It is scheduled on inner casing internal face, the outside wall surface of shell and the top surface parcel thermal insulation board of outer cover plate, Hopkinson incident bar and Hopkinson
The part that transmission bar stretches out thermal insulation board is cased with insulation plug, and insulation plug is contacted with thermal insulation board.
Compared with prior art, its remarkable advantage is the utility model：（1）It is simple in structure, it is swift to operate, it is economical real
With；
（2）Operating ambient temperature is not limited.
Brief description of the drawings
Fig. 1 is the system construction drawing that Hopkinson pressure bar experiment is carried out using the utility model.
Fig. 2 is the front view for the liquid nitrogen cooling device that the utility model is suitable for low-temperature dynamic experiment of machanics.
Fig. 3 is the sectional view for the liquid nitrogen cooling device that the utility model is suitable for low-temperature dynamic experiment of machanics.
Fig. 4 is the partial enlarged view that the utility model Hopkinson bar clamps test specimen part to be measured, wherein（a）For main view
Figure,（b）For side view.
Embodiment
The utility model is suitable for Hopkinson pressure bar experiment and Hopkinson pull rod is tested.Hopkinson pressure bar is real below
Exemplified by testing, the utility model is described in further detail with reference to attached drawing.
With reference to Fig. 1, trip rod 14, tachymeter 15, shaping piece 16, Hopkinson incident bar 17, test specimen to be measured 18, Huo Pujin
Gloomy transmission bar 19 and absorbing rod 20 form Hopkinson pressure bar experimental system.Hopkinson incident bar 17 and Hopkinson transmission bar
A semiconductor gauge 21 is pasted on 19 respectively.Semiconductor gauge 21 is connected to resistance bridge 22 and forms Hui Sidun electricity
Road, its signal collected reach 23 enhanced processing of high dynamic strain indicator, are finally shown and recorded by oscillograph 24.Liquid nitrogen
13 center of cooling device is arranged at 19 contact interface of Hopkinson incident bar 17 and Hopkinson transmission bar of alignment, just
In inner housing inner in cooling procedure, the regular temperature field centered on test specimen 18 to be measured is formed.Storage liquid nitrogen in liquid nitrogen container 25.
Appropriate liquid nitrogen is held in liquid nitrogen pot 26.
With reference to Fig. 2, Fig. 3 and Fig. 4, a kind of liquid nitrogen cooling device 16 suitable for low-temperature dynamic experiment of machanics, including inner casing
1st, shell 2, inner cover plate 3, outer cover plate 4, connection 6, two nuts 7 of bolt of thermal insulation board 5, two, insulation plug 8, casing 9, fan 10,
Several cool guiding blocks 11 and three thermometers 12.Inner casing 1 and shell 2 are the cuboid of end-cover-free, and inner casing 1 is arranged on shell 2
It is interior, air layer is accompanied between the two, beneficial to insulation inner casing 1；Set respectively at two faces center of inner casing 1 and 2 area of shell minimum
There is a first through hole through inner casing 1 and shell 2, two connection bolts 6 are each passed through in the first through hole, connect bolt
6 heads are stuck in the outside wall surface of shell 2, and screw rod stretches into inner casing 1, and is fastened with nut 7.Nut 7 is stuck in the inner wall of inner casing 1 after screwing
Face, the connection bolt 6 are equipped with second through hole along its center axis；Inner cover plate 3 is arranged in inner casing 1, and is located at nut 7
Top surface, is supported by nut 7；Outer cover plate 4 is arranged on the uncovered end top surface of inner casing 1, is contacted with 2 inner wall of shell；Inner cover plate 3 and outer
Thermal insulation board 5 is filled between cover board 4, and thermal insulation board 5 is sticked on outer cover plate 4；A circle is provided with any one angle of inner cover plate 3
The liquid nitrogen inlet of shape, the second through hole of Hopkinson incident bar 17 from a connection bolt 6 stretch into inner casing 1 and withstand test specimen to be measured
18, the second through hole of Hopkinson transmission bar 9 from another connection bolt 6 stretches into inner casing 1 and withstands test specimen 18 to be measured, and casing 9 will
18 end of test specimen closely to be measured of Hopkinson incident bar 17,18 end of test specimen closely to be measured of Hopkinson transmission bar 9 and test specimen to be measured 18 wrap up,
Make moist beneficial to test specimen 18 to be measured is prevented；Three thermometers 12 are uniformly distributed circumferentially the outer wall in casing 9, are treated for measuring in real time
Environment temperature around test block 18；Several cool guiding blocks 11 are arranged on 1 bottom surface of inner casing, increase by 1 cold-storage of inner casing and conduction cooling ability；
Fan 10 is fixed on 1 internal face of inner casing, is quickly formed beneficial to 1 internal rule temperature of inner casing；The outside wall surface and outer cover plate 4 of shell 2
Top surface parcel thermal insulation board 5, the part that Hopkinson incident bar 17 and Hopkinson transmission bar 19 stretch out thermal insulation board 5 is cased with keeping the temperature
Plug 8, insulation plug 8 is contacted with thermal insulation board 5.
Inner casing 1, shell 2, inner cover plate 3, outer cover plate 4 and 11 material of cool guiding block are aluminium.
Casing 9 is the thin-walled transparent body, and material is polyethylene.
Inner casing 1 and 2 various places inside temperature of shell are not necessarily identical.
Refrigeration source is liquid nitrogen, and liquid nitrogen vaporization heat absorption, cools down inner casing and its inner air, and then cools down test specimen [11] to be measured.
Test specimen [11] all surface to be measured smears a thin layer vaseline, makes moist beneficial to test specimen to be measured [11] is prevented.
By controlling injection liquid nitrogen quality and frequency, it is possible to achieve 18 environment temperature of test specimen to be measured is kept within a certain period of time
Near desired value in a certain range.
Liquid nitrogen cooling is carried out using the liquid nitrogen cooling device described in the utility model suitable for low-temperature dynamic experiment of machanics
Operating procedure be：
Before step 1, progress first time nitrogen cooling down operation, it is ensured that 3 water stain-free of inner casing 1 and inner cover plate.
Step 2, liquid nitrogen cooling device center are arranged on the Hopkinson incident bar 17 to have alignd and Hopkinson is saturating
Penetrate at the contact interface of bar 19.
Vaseline is smeared in step 3, the outer surface of test specimen to be measured 18.
Step 4, open inner cover plate 3 and outer cover plate 4, is set between Hopkinson incident bar 17 and Hopkinson transmission bar 19
Put test specimen 18 to be measured, casing 9 is by 18 end of test specimen closely to be measured of Hopkinson incident bar 17, the test specimen closely to be measured of Hopkinson transmission bar 9
18 ends and test specimen to be measured 18 wrap up, and cover inner cover plate 3；Hopkinson incident bar 17 and Hopkinson transmission bar 19 stretch out thermal insulation board
5 part puts on insulation plug 8.
Step 5, from liquid nitrogen container 25 pour into a large amount of liquid nitrogen into liquid nitrogen pot 26.
Step 6, after being poured slowly into a certain amount of liquid nitrogen into inner casing 1 from liquid nitrogen inlet by liquid nitrogen pot 26, cover outer cover
Plate 4, waits the temperature field that rule is set up inside inner casing 1；Three 12 registrations of thermometer are observed, between three 12 registrations of thermometer
Difference is within 2 DEG C, and mean temperature declines 10 DEG C or so at test specimen to be measured 18.
Step 7, repeat step 6, until temperature is -43 DEG C or so at test specimen 18 to be measured.
Step 8, wait tens of seconds, when temperature gradually rises up to -38 ~ -40 DEG C at test specimen 18 to be measured, opens outer cover plate 4,
A little liquid nitrogen is slowly injected into from liquid nitrogen inlet to internal box by liquid nitrogen pot 26, covers outer cover plate 4.It is to be tested after tens of seconds
Temperature will settle to -40 ~ -42 DEG C at part 18.At this time, it is believed that test specimen 18 to be measured is cold in the low temperature environment of -40 DEG C of target temperature
But.
Step 9, supplement appropriate liquid nitrogen, repeat step 8 into liquid nitrogen pot 26 from liquid nitrogen container 25 as needed, until reaching needs
Want cooling duration (for the test specimen volume of Hopkinson bar experiment, usually after several minutes of cooling, test specimen inner homogeneous
Reach target temperature).
Step 10, remove insulation plug 8, carries out Hopkinson experiment.
After step 11, experiment, outer cover plate 4 and inner cover plate 3 are opened, takes out casing 9 and test specimen to be measured 18.
Step 12, repeat step 3-11, are tested next time.
Claims (3)
- A kind of 1. liquid nitrogen cooling device suitable for low-temperature dynamic experiment of machanics, it is characterised in that：Including inner casing（1）, shell （2）, inner cover plate（3）, outer cover plate（4）, thermal insulation board（5）, two connection bolts（6）, two nuts（7）, insulation plug（8）, casing （9）, fan（10）, several cool guiding blocks（11）With three thermometers（12）；Inner casing（1）And shell（2）It is the length of end-cover-free Cube, inner casing（1）It is arranged on shell（2）It is interior, air layer is accompanied between the two；In inner casing（1）And shell（2）The two of area minimum A face center is respectively equipped with one and runs through inner casing（1）And shell（2）First through hole, two connection bolts（6）It is separately positioned on In the first through hole at both ends；The connection bolt（6）Second through hole is equipped with along its center axis, connects bolt（6）Head It is stuck in shell（2）Outside wall surface, screw rod stretches into inner casing（1）, and use nut（7）Fastening, nut（7）Inner casing is stuck in after screwing（1） Internal face, inner cover plate（3）It is arranged on inner casing（1）It is interior, and it is located at nut（7）Top surface；Outer cover plate（4）It is arranged on inner casing（1）'s Uncovered end top surface, with shell（2）Inner wall contacts；Inner cover plate（3）And outer cover plate（4）Between fill thermal insulation board（5）, and thermal insulation board glues In outer cover plate（4）On；In inner cover plate（3）Any one angle on be provided with a circular liquid nitrogen inlet；Hopkinson is incident Bar（17）From a connection bolt（6）The second through hole stretch into inner casing（1）Withstand test specimen to be measured（18）, Hopkinson transmission bar （19）From another connection bolt（6）The second through hole stretch into inner casing（1）Withstand test specimen to be measured（18）, casing（9）By Hope's gold Gloomy incident bar（17）Nearly test specimen to be measured（18）End, Hopkinson transmission bar（19）Nearly test specimen to be measured（18）End and test specimen to be measured（18） Parcel, three thermometers（15）It is uniformly distributed circumferentially in casing（9）Outer wall；Several cool guiding blocks（11）It is arranged on inner casing （1）Bottom surface, fan（10）It is fixed on inner casing（1）Internal face, shell（2）Outside wall surface and outer cover plate（4）Top surface parcel insulation Plate（5）, Hopkinson incident bar（17）With Hopkinson transmission bar（19）Stretch out thermal insulation board（5）Part be cased with insulation plug（8）, Insulation plug（8）With thermal insulation board（5）Contact.
- 2. the liquid nitrogen cooling device according to claim 1 suitable for low-temperature dynamic experiment of machanics（16）, it is characterised in that： The inner casing（1）, shell（2）, inner cover plate（3）, outer cover plate（4）And cool guiding block（11）Material is aluminium.
- 3. the liquid nitrogen cooling device according to claim 1 suitable for low-temperature dynamic experiment of machanics, it is characterised in that：It is described Casing（9）For the thin-walled transparent body, material is polyethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721215629.3U CN207300756U (en) | 2017-09-21 | 2017-09-21 | A kind of liquid nitrogen cooling device suitable for low-temperature dynamic experiment of machanics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721215629.3U CN207300756U (en) | 2017-09-21 | 2017-09-21 | A kind of liquid nitrogen cooling device suitable for low-temperature dynamic experiment of machanics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207300756U true CN207300756U (en) | 2018-05-01 |
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ID=62442960
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721215629.3U Expired - Fee Related CN207300756U (en) | 2017-09-21 | 2017-09-21 | A kind of liquid nitrogen cooling device suitable for low-temperature dynamic experiment of machanics |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207300756U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687981A (en) * | 2017-09-21 | 2018-02-13 | 南京理工大学 | A kind of liquid nitrogen cooling device suitable for low-temperature dynamic Experiments of Machanics |
| CN111366455A (en) * | 2020-05-09 | 2020-07-03 | 中国工程物理研究院总体工程研究所 | Test piece positioning and clamp cooling device for high-temperature dynamic stretching of precious metal |
| CN111707560A (en) * | 2020-06-19 | 2020-09-25 | 威胜利工程有限公司 | Cooling structure for low-temperature anchoring performance test |
-
2017
- 2017-09-21 CN CN201721215629.3U patent/CN207300756U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107687981A (en) * | 2017-09-21 | 2018-02-13 | 南京理工大学 | A kind of liquid nitrogen cooling device suitable for low-temperature dynamic Experiments of Machanics |
| CN107687981B (en) * | 2017-09-21 | 2023-12-15 | 南京理工大学 | Liquid nitrogen cooling device suitable for low temperature dynamic mechanical experiment |
| CN111366455A (en) * | 2020-05-09 | 2020-07-03 | 中国工程物理研究院总体工程研究所 | Test piece positioning and clamp cooling device for high-temperature dynamic stretching of precious metal |
| CN111707560A (en) * | 2020-06-19 | 2020-09-25 | 威胜利工程有限公司 | Cooling structure for low-temperature anchoring performance test |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180501 Termination date: 20190921 |
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| CF01 | Termination of patent right due to non-payment of annual fee |