CN203981478U - A kind of cooling system of realizing Hopkinson pressure bar low-temperature impact - Google Patents
A kind of cooling system of realizing Hopkinson pressure bar low-temperature impact Download PDFInfo
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- CN203981478U CN203981478U CN201420386969.2U CN201420386969U CN203981478U CN 203981478 U CN203981478 U CN 203981478U CN 201420386969 U CN201420386969 U CN 201420386969U CN 203981478 U CN203981478 U CN 203981478U
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- heat insulation
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Abstract
The utility model discloses a kind of cooling system of realizing Hopkinson pressure bar low-temperature impact, comprise power system, cooling system and control system, power system comprises cooled containers, cooling medium and electro-heat equipment, cooling system comprises gas eduction tube, heat insulation mould and sample, one end of gas eduction tube is communicated with cooled containers, the other end is provided with heat insulation mould, and sample is installed in heat insulation mould, and specimen surface is provided with thermopair; Sample holder is contained between the incident bar and transmission bar of Hopkinson pressure bar device; Described control system comprises electric power controller and temperature controller, and electric power controller is connected with electro-heat equipment, and temperature controller is connected with thermopair, and electric power controller is connected with temperature controller.The utility model adopt between parts, assemble simple, convenient; Realized temperature and automatically controlled, and cooling medium is fully used, cooling velocity is fast, and work efficiency is high, and non-environmental-pollution is applicable to the application of various testing laboratories and SHPB experimental provision.
Description
Technical field
The utility model relates to shock dynamics field, particularly a kind of cooling system of realizing Hopkinson pressure bar low-temperature impact.
Background technology
With respect to high-temperature Hopkinson pressure bar (SHPB) experiment, people are less to the research of low temperature Hopkinson pressure bar experiment, how rapidly sample carried out cooling and collect effective experimental data and become problem demanding prompt solution.Carrying out low temperature SHPB tests a difficult problem of encountering and mainly contains three, the one, take which kind of refrigeration modes, the 2nd, (specimen temperature of ubiquity is more than-100 DEG C at present how to make the chilling temperature of sample low as far as possible, and often there is larger change at-196 DEG C of dynamic mechanicals to-100 DEG C of following temperature ranges and microstructure Evolution in sample), the 3rd, how the temperature of sample is comparatively accurately measured.At present, in SHPB experiment, to the cooling liquid nitrogen circularly cooling mode that generally adopts the development of SANDIA National Laboratory of the U.S. of sample, adopt the defect of the method refrigeration to be: device fabrication processed complex, cooling medium utilization factor is low, in refrigeration cassette, air gradient differs greatly, and requires high to the placement of temperature thermocouple.By changing refrigeration modes and thermometric mode, Some Domestic scholar Preliminary development some easy SHPB sub-cooled equipment.But still there is more shortcoming in these equipment.
summary of the invention
In order to solve the problems of the technologies described above, the utility model provides that a kind of simple in structure, installation steps are simple, processing ease, the cooling system of realizing Hopkinson pressure bar low-temperature impact that work efficiency is high, this system can make full use of cooling medium, expand to greatest extent the chilling temperature scope of sample, meanwhile, can control accurately specimen temperature by temperature controller and electric power controller; Cooling and the SHPB impact experiment of sample carries out at same position, and the collection of data is more quick, accurate with processing.
The technical solution adopted in the utility model is: comprise power system, cooling system and control system, described power system comprises cooled containers, cooling medium and electro-heat equipment, and described cooling medium and electro-heat equipment are placed in cooled containers; Described cooling system comprises gas eduction tube, heat insulation mould and sample, one end of gas eduction tube is communicated with cooled containers, and the other end is provided with heat insulation mould, and the sidewall of heat insulation mould is provided with a through hole, sample is arranged in this through hole, and in heat insulation mould, specimen surface is provided with thermopair; The two ends of sample grow heat insulation mould, and sample holder is contained between the incident bar and transmission bar of Hopkinson pressure bar device; Described control system comprises electric power controller and temperature controller, and described electric power controller is connected with electro-heat equipment, and temperature controller is connected with thermopair, and electric power controller is connected with temperature controller.
In the above-mentioned cooling system of realizing Hopkinson pressure bar low-temperature impact, on described heat insulation mould punch, be provided with boss and U-shaped groove with the link of heat insulation mould die, the axis of U-shaped groove is perpendicular to the axis of heat insulation mould punch, the bottom of U-shaped groove is semicircle, and the center of circle is positioned on boss bottom surface; Corresponding to boss and the U-shaped groove of heat insulation mould punch, on heat insulation mould die, be provided with groove and the semicircle groove perpendicular to heat insulation mould die axis with heat insulation mould punch link, the center of circle of semicircle groove is positioned on the end face of heat insulation mould die, the projection of heat insulation mould punch is inlaid in the groove of heat insulation mould die, and the semicircle groove of the U-shaped groove of heat insulation mould punch and heat insulation mould die forms two manholes that heat insulation mould inner chamber is in communication with the outside.
In the above-mentioned cooling system of realizing Hopkinson pressure bar low-temperature impact, the bottom surface of described heat insulation mould punch is provided with two grooves, corresponding to two grooves on heat insulation mould punch bottom surface, on the bottom surface of heat insulation mould die, be also provided with two grooves, in heat insulation mould punch two groups of grooves corresponding with heat insulation mould die, be respectively equipped with bungee.
In the above-mentioned cooling system of realizing Hopkinson pressure bar low-temperature impact, described electro-heat equipment is ceramic heater.
In the above-mentioned cooling system of realizing Hopkinson pressure bar low-temperature impact, gas eduction tube is derived mould by gas and is communicated with cooled containers, and described gas is derived mould outlet end and is provided with boss, and the both sides of boss are provided with cable hole; Gas is derived mould outlet outer silk pagoda outlet nozzle is installed, and outer silk pagoda outlet nozzle is connected with one end of gas eduction tube.
In the above-mentioned cooling system of realizing Hopkinson pressure bar low-temperature impact, described heat insulation mould punch is provided with thermocouple hole, and thermopair passes also stretching from thermocouple hole, be connected with temperature controller by lead-in wire.
In the above-mentioned cooling system of realizing Hopkinson pressure bar low-temperature impact, described cooling medium is liquid nitrogen.
Compared with prior art, the utility model beneficial effect be:
In (I) the utility model, gas is derived Design of Dies boss, facilitates gas to derive mould and installs and dismantle, and has avoided gas derivation mould that the difficulty of dismounting occurs because expanding with heat and contract with cold.
In (II) the utility model, heat insulation mould punch is provided with boss, heat insulation mould die is provided with corresponding groove, the boss of heat insulation mould punch is inlaid in the groove of heat insulation mould die, save mould support part, solved heat insulation mould punch and heat insulation mould die interlock problem when mounted.
In (III) the utility model, on heat insulation mould punch and heat insulation mould die bottom surface, be equipped with groove, for elastic ropes such as bungees, heat insulation mould punch and heat insulation mould die are strained, thus the refrigerating gas waste of having avoided heat insulation mould punch and gap, heat insulation mould die junction to cause.
In (IV) the utility model, heat insulation mould punch is provided with the thermocouple hole of placing thermopair, loads onto after sample, and tension thermopair, has avoided thermocouple wire to contact with incident bar or transmission bar or certainly contacted the experimental error of bringing.
In (V) the utility model, in cooled containers, adopt ceramic heater as electro-heat equipment, avoided the design of complicated refrigeration cassette and processing, employing liquid nitrogen is cooling medium, and ceramic heater makes the liquid nitrogen steam that gushes out even, does not have the poor problem of thermograde.
(VI) the utility model adopts fabricated structure, and it is simple, convenient between parts, to assemble; The utility model has been realized temperature and has automatically been controlled, and cooling medium is fully used, and cooling velocity is fast, work efficiency is high, and non-environmental-pollution is economical and practical, be applicable to the application of various testing laboratories and SHPB experimental provision, very easily penetration and promotion, has wide market outlook.
Brief description of the drawings
Fig. 1 is low temperature Hopkinson pressure bar experiment cooling system schematic diagram and cooling segment structural drawing.
Fig. 2 is the connection layout of cooling system of the present utility model.
Fig. 3 is the front view that the utility model gas is derived mould.
Fig. 4 is the vertical view that the utility model gas is derived mould.
Fig. 5 is the front view of heat insulation mould punch of the present utility model.
Fig. 6 is A-A cut-open view in Fig. 5.
Fig. 7 is the front view of heat insulation mould die of the present utility model.
Fig. 8 is B-B cut-open view in Fig. 7.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the utility model comprises power system 2, cooling system 3 and control system 1, described power system 2 comprises cooled containers 21, cooling medium and electro-heat equipment 22, described cooled containers 21 is liquid nitrogen container, described cooling medium adopts liquid nitrogen, and described electro-heat equipment 22 adopts ceramic heater; Cooling medium and electro-heat equipment 22 are placed in cooled containers 21.
As shown in Figure 2, described cooling system 3 comprises gas eduction tube 34, gas derivation mould 37, heat insulation mould 31 and sample 33, and as shown in Figure 3,4, described gas is derived mould 37 endpiece and is provided with boss 371, facilitates gas to derive mould 37 and installs and dismantle.The both sides of boss 371 are provided with cable hole 372; The outlet that gas is derived mould 37 is provided with outer silk pagoda outlet nozzle 36, and outer silk pagoda outlet nozzle 36 is connected with one end of gas eduction tube 34 by straight-through copper sleeve 35.Described gas eduction tube 34 adopts PVC water pipe, and gas is derived mould 37 and is arranged on cooled containers 21, and is communicated with cooled containers 21.
Described heat insulation mould 31 is formed by connecting by heat insulation mould punch 312 and heat insulation mould die 311.As shown in Fig. 5-8, on described heat insulation mould punch 312, be provided with boss 3121 and U-shaped groove 3122 with the link of heat insulation mould die 311, the axis of U-shaped groove 3122 is perpendicular to the axis of heat insulation mould punch 312, the bottom of U-shaped groove 3122 is semicircle, and the center of circle is positioned on the bottom surface of boss 3121.Corresponding to boss 3121 and the U-shaped groove 3122 of heat insulation mould punch 312, on heat insulation mould die 311, be provided with groove 3111 and the semicircle groove 3112 perpendicular to the axis of heat insulation mould die 311 with heat insulation mould punch 312 links, the center of circle of semicircle groove 3112 is positioned on the end face of heat insulation mould die 311, the projection 3121 of heat insulation mould punch 312 is inlaid in the groove 3111 of heat insulation mould die 311, the U-shaped groove 3122 of heat insulation mould punch 312 and the semicircle groove 3112 of heat insulation mould die 311 form the manhole that the inner chamber of a heat insulation mould 31 is in communication with the outside.The bottom surface of described heat insulation mould punch 312 is provided with two grooves 3123, corresponding to two grooves 3123 on heat insulation mould punch 312 bottom surfaces, on the bottom surface of heat insulation mould die 311, be also provided with two grooves 3113, in the corresponding two groups of grooves of heat insulation mould punch 312 and heat insulation mould die 311, be respectively equipped with bungee, bungee is strained heat insulation mould punch 312 and heat insulation mould die 311, thus the refrigerating gas of having avoided heat insulation mould punch 312 to be connected with heat insulation mould die 311 causing in gap waste.On described heat insulation mould punch 312 with the link of heat insulation mould die 311, also be provided with the second U-shaped groove 3124, the projection 3121 of heat insulation mould punch 312 be inlaid in the groove 3111 of heat insulation mould die 311 interior after, this second U-shaped groove 3124 forms thermocouple hole with heat insulation mould die 311.
Described sample 33 is arranged in the manhole that the semicircle groove 3112 of heat insulation mould die 311 forms, sample 33 surfaces in heat insulation mould 31 are provided with thermopair 32, thermopair 32 thermocouple hole from heat insulation mould punch 312 passes and is stretching, thereby has avoided thermopair 32 to contact with incident bar 41 or transmission bar 42 or certainly contacted and cause that data are incorrect.The two ends of described sample 33 grow heat insulation mould 31, and sample 33 is installed between the incident bar 41 and transmission bar 42 of Hopkinson pressure bar device 4.
Described control system 1 comprises electric power controller 11 and temperature controller 12, described electric power controller 11 is connected with the electro-heat equipment 22 of power system 2, temperature controller 12 is connected with cooling system 3 thermopairs 32, and electric power controller 11 is connected with temperature controller 12.
Principle of work of the present utility model is as follows: the utility model drives liquid nitrogen ejection by the temperature of electric power controller 11 regulation heating devices 22, deriving mould 37 by gas draws gas, make the liquid nitrogen steam of drawing be retained in to greatest extent 31 li of heat insulation moulds by heat insulation mould 31, and build rapidly a low temperature environment.Test button is placed in to heat insulation mould 31.Sample is in low temperature environment, thereby temperature reduces rapidly.According to the signal that is arranged on specimen surface thermopair 2 and detects, import temperature controller 12 into, temperature controller 12 can be controlled according to the size of predetermined temperature: when specimen temperature is during higher than design temperature, continue electro-heat equipment 22 to switch on, make it heat production, drive the ejection of liquid nitrogen steam, further carry out cooling to sample.In the time that the temperature of sample arrives design temperature, temperature controller 12 is to electro-heat equipment 22 power-off, stops cooling to sample.Reach after the temperature requirement of sample 33, the air pump 43 of Hopkinson pressure bar device 4 makes the bullet in gun barrel impact transmitting, carries out SHPB impulse test.Realize sample cooling and carried out with SHPB impulse test simultaneously, ensured to test temperature required accuracy, thereby ensured the degree of accuracy of test findings.
Specific implementation process of the present utility model is as follows: first cooled containers 21 is lifted to suitable position, with electric soldering iron by the 22 terminals welding of high temperature resistant wire one end and electro-heat equipment, the other end is derived respectively the cable hole 372 of mould 37 through gas, connect ordinary plug.Then mention electro-heat equipment 22, put into lentamente cooled containers 21.After putting well, can be used in conjunction with monkey wrench jam-pack gas and derive mould 37, plug inserts the current output terminal of electric power controller 11; Outer silk pagoda outlet nozzle 36 plug end are inserted to gas and derive mould 37, select the PVC water pipe of suitable dimension, in its coated outside after air-conditioning heat insulation pipe as gas eduction tube 34, then one end is by straight-through copper sleeve 35 connection outside screw pagoda outlet nozzles 36, and the other end connects the heat insulation mould punch 312 of heat insulation mould 31.Thermopair 32 both positive and negative polarities are tied up respectively in the side of sample 33, sample 33 is installed between the incident bar 41 and transmission bar 42 of Hopkinson pressure bar device 4, and allows thermopair 32 pass from the thermocouple hole of heat insulation mould punch 312.Cover heat insulation mould die 311, use bungee in two groups of grooves of the bottom surface of heat insulation mould die 311 and heat insulation mould punch 312.
Thermopair 32 is connected with temperature controller 12, electric power controller 11 is connected with temperature controller 12.The external 220V power supply of electric power controller 11, last, turns on power controller 11, start-up temperature controller 12 simultaneously, electro-heat equipment 22 heat production of switching on, drives liquid nitrogen steam to spray from liquid nitrogen container.In the time that sample 33 temperature reach predetermined temperature, temperature controller 12 is to electric power controller 11 power-off.Booster air pump 43, carries out impact compression test to sample 33.
Claims (7)
1. realize the cooling system of Hopkinson pressure bar low-temperature impact for one kind, it is characterized in that: comprise power system, cooling system and control system, described power system comprises cooled containers, cooling medium and electro-heat equipment, and described cooling medium and electro-heat equipment are placed in cooled containers; Described cooling system comprises gas eduction tube, heat insulation mould and sample, one end of gas eduction tube is communicated with cooled containers, and the other end is provided with heat insulation mould, and the sidewall of heat insulation mould is provided with a through hole, sample is arranged in this through hole, and in heat insulation mould, specimen surface is provided with thermopair; The two ends of sample grow heat insulation mould, and sample holder is contained between the incident bar and transmission bar of Hopkinson pressure bar device; Described control system comprises electric power controller and temperature controller, and described electric power controller is connected with electro-heat equipment, and temperature controller is connected with thermopair, and electric power controller is connected with temperature controller.
2. the cooling system of realizing Hopkinson pressure bar low-temperature impact according to claim 1, it is characterized in that: on described heat insulation mould punch, be provided with boss and U-shaped groove with the link of heat insulation mould die, the axis of U-shaped groove is perpendicular to the axis of heat insulation mould punch, the bottom of U-shaped groove is semicircle, and the center of circle is positioned on boss bottom surface; Corresponding to boss and the U-shaped groove of heat insulation mould punch, on heat insulation mould die, be provided with groove and the semicircle groove perpendicular to heat insulation mould die axis with heat insulation mould punch link, the center of circle of semicircle groove is positioned on the end face of heat insulation mould die, the projection of heat insulation mould punch is inlaid in the groove of heat insulation mould die, and the semicircle groove of the U-shaped groove of heat insulation mould punch and heat insulation mould die forms two manholes that heat insulation mould inner chamber is in communication with the outside.
3. the cooling system of realizing Hopkinson pressure bar low-temperature impact according to claim 2, it is characterized in that: the bottom surface of described heat insulation mould punch is provided with two grooves, corresponding to two grooves on heat insulation mould punch bottom surface, on the bottom surface of heat insulation mould die, be also provided with two grooves, in heat insulation mould punch two groups of grooves corresponding with heat insulation mould die, be respectively equipped with bungee.
4. the cooling system of realizing Hopkinson pressure bar low-temperature impact according to claim 1, is characterized in that: described electro-heat equipment is ceramic heater.
5. the cooling system of realizing Hopkinson pressure bar low-temperature impact according to claim 1, it is characterized in that: described gas eduction tube is derived mould by gas and is communicated with cooled containers, described gas is derived mould outlet end and is provided with boss, and the both sides of boss are provided with cable hole; Gas is derived mould outlet outer silk pagoda outlet nozzle is installed, and outer silk pagoda outlet nozzle is connected with one end of gas eduction tube.
6. the cooling system of realizing Hopkinson pressure bar low-temperature impact according to claim 1, is characterized in that: described heat insulation mould punch is provided with thermocouple hole, and thermopair passes also stretching from thermocouple hole, be connected with temperature controller by lead-in wire.
7. the cooling system of realizing Hopkinson pressure bar low-temperature impact according to claim 1, is characterized in that: described cooling medium is liquid nitrogen.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420386969.2U CN203981478U (en) | 2014-07-14 | 2014-07-14 | A kind of cooling system of realizing Hopkinson pressure bar low-temperature impact |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420386969.2U CN203981478U (en) | 2014-07-14 | 2014-07-14 | A kind of cooling system of realizing Hopkinson pressure bar low-temperature impact |
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| CN203981478U true CN203981478U (en) | 2014-12-03 |
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| CN201420386969.2U Expired - Fee Related CN203981478U (en) | 2014-07-14 | 2014-07-14 | A kind of cooling system of realizing Hopkinson pressure bar low-temperature impact |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203381A (en) * | 2015-09-25 | 2015-12-30 | 中国石油大学(北京) | Low-temperature cooling pressure applying device |
| 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 |
| CN110262587A (en) * | 2019-05-29 | 2019-09-20 | 南京航空航天大学 | Intelligent controllable temperature formula Hopkinson pressure bar test low temperature loading device and temperature control method |
-
2014
- 2014-07-14 CN CN201420386969.2U patent/CN203981478U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105203381A (en) * | 2015-09-25 | 2015-12-30 | 中国石油大学(北京) | Low-temperature cooling pressure applying device |
| CN105203381B (en) * | 2015-09-25 | 2018-05-08 | 中国石油大学(北京) | A kind of sub-cooled device for exerting |
| 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 |
| CN110262587A (en) * | 2019-05-29 | 2019-09-20 | 南京航空航天大学 | Intelligent controllable temperature formula Hopkinson pressure bar test low temperature loading device and temperature control method |
| CN110262587B (en) * | 2019-05-29 | 2023-11-03 | 南京航空航天大学 | Low-temperature loading device and temperature control method for intelligent temperature-controllable Hopkinson pressure bar test |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141203 Termination date: 20170714 |
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| CF01 | Termination of patent right due to non-payment of annual fee |