CN107378801A - Multiple exit controllable temperature abradant jet cooling device - Google Patents
Multiple exit controllable temperature abradant jet cooling device Download PDFInfo
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- CN107378801A CN107378801A CN201710747740.5A CN201710747740A CN107378801A CN 107378801 A CN107378801 A CN 107378801A CN 201710747740 A CN201710747740 A CN 201710747740A CN 107378801 A CN107378801 A CN 107378801A
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- Prior art keywords
- jet
- exit
- pipe
- temperature
- liquid nitrogen
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
- B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material
Abstract
A kind of multiple exit controllable temperature abradant jet cooling device, it is characterised in that：It includes cooler bin and multiple exit coiled pipe；Described cooler bin mainly includes cooling box（1）, box cover（2）And feed tube（3）, cooling box（1）And box cover（2）Form a liquid nitrogen storage chamber that can be opened and closed；Described multiple exit coiled pipe is immersed in the liquid nitrogen of described liquid nitrogen storage chamber, its jet inlet（5）Stretch out outside casing and be connected with abrasive material supply pipe, the part that multiple exit coiled pipe is located in liquid nitrogen storage chamber is connected with multiple jet exit pipes（6）, jet exit pipe（6）The port of export stretch out cooling box（1）Outside to carry out jet processing to work piece, and from jet inlet（5）More remote jet exit pipe（6）The temperature of the abrasive material of outflow is lower.Simple in construction, temperature-controllable of the invention.
Description
Technical field
The present invention relates to a kind of low temperature abradant jet manufacture field, especially a kind of adjustable cooling of jet exit temperature
Device, specifically a kind of multiple exit controllable temperature abradant jet cooling device.
Background technology
In recent years, there is a kind of novel Micrometer-Nanometer Processing Technology, i.e., accelerate minute abrasive with the compressed air of drying
Abradant jet is formed, jet is ejected into workpiece surface workpiece is processed, referred to as abradant jet process technology.Abrasive material is penetrated
It is relatively low to flow process technology cost, very high material removing rate can be obtained during processing, and material removing rate is controllable.Abradant jet adds
Work technology can be used for processing glass, ceramics and non-ferrous metal etc..
Ceramic material in some occasions and is not applied to due to the limitation of its own.As ceramic material lacks optical clear
Property, and thus application in biomedicine is limited its limited biocompatibility.Based on this, people start to use polymeric material
Expect to substitute ceramic material.But most of polymer is hydrophobic material, entered using the abradant jet and water-jet technology of routine
During row processing, material removing rate is relatively low.It has been investigated that at low temperature, abradant jet processing is carried out to polymer, material removes
Rate is higher.
External at present to carry out low temperature abradant jet processing using two kinds of experimental provisions, one of which device is abradant jet stream
Realize the purpose of cooling through liquid nitrogen container, this device take up space it is excessive, it is cumbersome, and jet temperature is uncontrollable.Another kind dress
Liquid nitrogen injection and abradant jet is set to carry out, to penetrating, forming the abradant jet containing liquid nitrogen, this device pair with certain incidence angle
Abradant jet cooling effect is poor, and liquid nitrogen and abradant jet are difficult to be sufficiently mixed, simultaneously because two jets are easily led to penetrating
Abradant jet is caused to deviate former track.The shortcomings that in view of above two device, it is necessary to design a kind of multiple exit controllable temperature abrasive material
Jet cooling device, is cooled down to abradant jet, and jet exit temperature range is at -80 DEG C~-190 DEG C.
The content of the invention
The purpose of the present invention is low etc. for the polymeric material clearance in the presence of Conventional abrasives jet process
Problem, a kind of multiple exit controllable temperature abradant jet cooling device dedicated for the processing of polymeric material jet of design.
The technical scheme is that：
A kind of multiple exit controllable temperature abradant jet cooling device, it is characterised in that：It includes cooler bin and multiple exit coiled pipe；Institute
The cooler bin stated mainly includes cooling box 1, box cover 2 and feed tube 3, and cooling box 1 and box cover 2 form an energy
The liquid nitrogen storage chamber of opening and closing, the liquid nitrogen storage chamber are connected by coupled logical feed tube 3 with liquid nitrogen source, and liquid nitrogen source can be continuous
Or discontinuously supply liquid nitrogen for liquid nitrogen storage chamber and be in ensureing that liquid nitrogen deposits the temperature of mansion intracavitary in setting range；Described has more
Mouthful coiled pipe is immersed in the liquid nitrogen of described liquid nitrogen storage chamber, and it is outer with abrasive material supply pipe phase that its jet inlet 5 stretches out casing
Connection, the part that multiple exit coiled pipe is located in liquid nitrogen storage chamber are connected with multiple jet exit pipes 6, and jet exit pipe 6 goes out
It is outer to carry out jet processing, and the jet exit pipe 6 more remote from jet inlet 5 to work piece that cooling box 1 is stretched out at mouthful end
The temperature of the abrasive material of outflow is lower.
Described box cover 2 is provided with the observation panel 4 for being used for observing cooling box inner case.
Described multiple jet exit pipes 6 can individually, partly or entirely carry out jet processing.
When described jet exit pipe 6 is equipped with plug 8 and seal cap 9 is sealed so that described jet exit pipe 6 does not work
It can seal in time, sealing plug 8 is inserted in jet exit pipe 6, and the spinning of seal cap 9 is on jet exit pipe 6.
Cryogenic ball valve 7 is mounted on described multiple exit coiled pipe, between adjacent two jet exit pipes 6, with
It is easy to the control to the break-make of jet exit pipe 6.
The tank wall and box cover 2 of described cooling box 1 are vacuum structure, outside cooling box 1 and box cover 2
Portion is enclosed with foaming thermal-insulating, so as to realize cooler bin double-layer heat insulation.
Described multiple exit coiled pipe is provided with seven jet exits 6, when abradant jet flows out from different jet exits 6
When, it is also differed by the time that liquid nitrogen cools down, therefore can obtain the low temperature abradant jet of different temperatures.
Described abradant jet from some jet exit pipe 6 flow out when, remaining jet exit pipe 6 be in seal shape
State, jet exit pipe 6 are sealed by sealing plug 8 and seal cap 9, and sealing plug 8 uses PCTFE materials, sealing plug 8
Length is more than the length of pipeline at jet exit pipe 6, so as to avoid abradant jet from flowing into the pipeline in addition to exit, seal cap
9 and jet exit pipe 6 using threaded connection, the structure of seal cap 9 is identical with nylon self-locking nut, is produced after being extruded by nylon
Raw screen resilience is locking.
Described multiple exit coiled pipe is copper pipe, is attached by six cryogenic ball valves 7, cryogenic ball valve 7 is by rotating valve
Door opens and closes to control, low before the jet exit when abradant jet flows out from some jet exit pipe 6
Warm ball valve 7 is fully open, the cryogenic ball valve Close All after the jet exit pipe 6, it is ensured that abradant jet can only be from this
Jet exit pipe 6 flows out, so as to obtain the low temperature abradant jet of specified temp；Described cryogenic ball valve 7 and jet exit pipe 6 one
One correspondence, the horizontal range between cryogenic ball valve 7 and corresponding jet exit pipe 6 are less than 1cm, can when cryogenic ball valve 7 is closed
Ensure that abradant jet flows directly into corresponding jet exit pipe 6, reduce the energy loss of abradant jet；Described cooler bin
Box cover 2 can be opened, and cooler bin is connected with multiple exit coiled pipe by the way of welding, therefore multiple exit coiled pipe is non-disconnectable
Unload, open whether the observable cooler bin internal structure of box cover 2 is damaged, opening box cover 2 can also repair and change
Cryogenic ball valve 7.
Described multiple exit coiled pipe designs according to required jet temperature；For different jet temperatures
T F, out , the length that abradant jet flows through in multiple exit coiled pipe is：
In formula,hFor convection transfer rate,T w For wall surface temperature,T f For qualitative temperature,lFor duct length,ρFor atmospheric density,c ρ
For specific heat at constant pressure,AFor conduit cross-sectional area,vFor jet inlet speed,T f,in For jet inlet temperature,T f,ou t Go out for jet
Mouth temperature, take the qualitative temperature that inlet and outlet mean temperature is air.
Beneficial effects of the present invention：
The present invention can realize the cooling to abradant jet, it have it is simple in construction, it is easy to operate, it is easy to accomplish and regulation is excellent
Point.
The present invention can obtain the low temperature abradant jet of different temperatures.It is simple to operate without dismounting.Polymer is mostly thin
Water material, abradant jet processing is difficult at normal temperatures, but at low temperature, abradant jet processing is carried out to polymer, can be real
Now higher material removing rate.The present invention can obtain the low temperature abradant jet of different temperatures, -80 DEG C of jet exit temperature range
~-190 DEG C.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of the present invention.
Fig. 2 is Fig. 1 cross section structure diagram.
Fig. 3 is the present invention and pipeline structure schematic diagram.
Embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples.
As Figure 1-3.
A kind of multiple exit controllable temperature abradant jet cooling device, it includes cooler bin and multiple exit coiled pipe；Described is cold
But case mainly includes cooling box 1, box cover 2 and feed tube 3, what cooling box 1 and the formation of box cover 2 one can be opened and closed
Liquid nitrogen storage chamber, box cover 2 are provided with the observation panel 4 for being used for observing cooling box inner case.Described cooling box 1
Tank wall and box cover 2 are vacuum structure, have foaming thermal-insulating in cooling box 1 and the outer wrap of box cover 2, so as to
Cooler bin double-layer heat insulation is realized, as shown in figure 1, the box cover 2 of cooler bin can be opened in order to repair.Described liquid nitrogen storage
Chamber is connected by coupled logical feed tube 3 with liquid nitrogen source, and liquid nitrogen source continuously or discontinuously can supply liquid for liquid nitrogen storage chamber
Nitrogen is in setting range with ensureing that liquid nitrogen deposits the temperature of mansion intracavitary；Described multiple exit coiled pipe is immersed in described liquid nitrogen and deposited
In the liquid nitrogen of storage chamber, its jet inlet 5 is stretched out outside casing to be connected with abrasive material supply pipe, and multiple exit coiled pipe is deposited positioned at liquid nitrogen
Part in storage chamber is connected with multiple jet exit pipes 6, and seven jet exit pipes 6 are shared in Fig. 2 and Fig. 3（Respectively 6-1,6-
2、6-3、6-4、6-5、6-6、6-7）, seven jet exit pipes 6 can individually carry out jet processing, also can partly or entirely simultaneously
Carry out jet processing.The port of export of jet exit pipe 6 is stretched out to carry out jet processing to work piece outside cooling box 1, and
The temperature for the abrasive material that the jet exit pipe 6 more remote from jet inlet 5 flows out is lower.When one or part streams outlet 6 are carried out
Jet process when, remaining jet exit pipe need closed, can by multiple exit coiled pipe install additional cryogenic ball valve 7 and/
Or realized for the configuration of jet exit pipe 6 sealing plug 8 and the method for seal cap 9, so that described jet exit pipe 6 not work
It can be sealed in time when making, sealing plug 8 is inserted in jet exit pipe 6, and the spinning of seal cap 9 is on jet exit pipe 6.Cryogenic ball valve
7（Quantity is 6, respectively 7-1,7-2,7-3,7-4,7-5,7-6）It can be arranged on described multiple exit coiled pipe and be located at
Between two adjacent jet exit pipes 6, as shown in figure 3, the handle of cryogenic ball valve 7 is located at outside casing 1（As shown in Figure 1）So as to
In the control to the break-make of jet exit pipe 6.When abradant jet flows out from different jet exit 6, its by liquid nitrogen cool down when
Between also differ, therefore the low temperature abradant jet of different temperatures can be obtained.
If single tube jet process, then abradant jet from some jet exit pipe 6 flow out when, remaining jet exit
Pipe 6 is in sealing state, and jet exit pipe 6 is sealed by sealing plug 8 and seal cap 9, and sealing plug 8 uses PCTFE
Material, the length of sealing plug 8 are more than the length of pipeline at jet exit pipe 6, and exit is removed so as to avoid abradant jet from flowing into
Pipeline in addition, seal cap 9 and jet exit pipe 6 are using threaded connection, and the structure of seal cap 9 is identical with nylon self-locking nut, energy
Screen resilience caused by after being extruded by nylon is locking.As shown in figure 3, the multiple exit coiled pipe of the present embodiment is copper pipe, by six
Individual cryogenic ball valve 7 is attached, cryogenic ball valve 7 by rotating valve come control open and close, when abradant jet from some
When jet exit pipe 6 flows out, the cryogenic ball valve 7 before the jet exit is fully open, after the jet exit pipe 6
Cryogenic ball valve Close All, it is ensured that abradant jet can only flow out from the jet exit pipe 6, so as to obtain the low temperature of specified temp
Abradant jet；Described cryogenic ball valve 7 and jet exit pipe 6 corresponds, cryogenic ball valve 7 and corresponding jet exit pipe 6 it
Between horizontal range be less than 1cm, when cryogenic ball valve 7 is closed, it is ensured that abradant jet flow directly into corresponding to jet exit pipe
6, reduce the energy loss of abradant jet.Cooler bin is connected with multiple exit coiled pipe by the way of welding, therefore multiple exit
Coiled pipe is non-dismountable, opens whether the observable cooler bin internal structure of box cover 2 is damaged, and opens box cover 2 also
It can repair and change cryogenic ball valve 7.
The length of multiple exit coiled pipe can design according to required jet temperature；For different jet temperaturesT F, out ,
The length that abradant jet flows through in multiple exit coiled pipe is：
In formula,hFor convection transfer rate,T w For wall surface temperature,T f For qualitative temperature,lFor duct length,ρFor atmospheric density,c ρ
For specific heat at constant pressure,AFor conduit cross-sectional area,vFor jet inlet speed,T f,in For jet inlet temperature,T f,ou t Go out for jet
Mouth temperature, take the qualitative temperature that inlet and outlet mean temperature is air.dFor the diameter of multiple exit coiled pipe.
The course of work of the present invention is as follows：Liquid nitrogen container is opened, liquid nitrogen enters cooler bin by feed tube 3；Abradant jet leads to
Cross jet inlet 5 and enter multiple exit coiled pipe, the cryogenic ball valve 7 before the jet exit pipe 6 of nozzle is connect（Respectively 7-1,
7-2、7-3、7-4、7-5、7-6）It is fully open, the Close All of cryogenic ball valve 7 after the jet exit pipe 6 of nozzle is connect；
When abradant jet flows out from different jet exits 6, the low temperature abradant jet of different temperatures can be obtained.
The temperature control method of the present invention is as follows：Different outlet temperatures is for different duct lengths, therefore, a multiple exit
Coiled pipe can obtain 7 outlet temperatures, the duct length corresponding to different outlet temperatures pass through calculated to calculation formula, such as
For the present apparatus, import jet pressure 32.7KPa, import effluxvelocity 224.5m/s, 2 DEG C of import jet temperature, according to institute are taken
To calculation formula, when jet exit temperature is -190 DEG C, corresponding duct length should be 141cm, be found through experiment, use
The coiled pipe of 150cm length, jet exit temperature are -192 DEG C, are more consistent with result of calculation.Therefore formula is given to be used as meter
Calculate the reference of snakelike length of tube.
Described above is presently preferred embodiments of the present invention, is not intended to limit the invention, do not depart from spirit of the invention and
On the premise of scope, various changes and modifications of the present invention are possible, these changes and improvements should be included in the present invention protection it
It is interior.The claimed scope of the invention is defined by appended claims and coordinate.Meanwhile although more use herein
Cooling box 1, box cover 2, feed tube 3, observation panel 4, jet inlet 5, jet exit pipe 6, cryogenic ball valve 7, sealing plug
8th, the term such as seal cap 9, but it is not precluded from the possibility using other terms.Using these terms just for the sake of more easily
Describe and explain the essence of the present invention；Being construed as any additional limitation is disagreed with spirit of the present invention
's.
Part that the present invention does not relate to is same as the prior art or can be realized using prior art.
Claims (10)
- A kind of 1. multiple exit controllable temperature abradant jet cooling device, it is characterised in that：It includes cooler bin and multiple exit coiled pipe； Described cooler bin mainly includes cooling box（1）, box cover（2）And feed tube（3）, cooling box（1）And box cover （2）A liquid nitrogen storage chamber that can be opened and closed is formed, the liquid nitrogen storage chamber passes through coupled logical feed tube（3）With liquid nitrogen source phase Even, liquid nitrogen source continuously or discontinuously can supply liquid nitrogen to ensure that liquid nitrogen deposits the temperature of mansion intracavitary in setting model for liquid nitrogen storage chamber In enclosing；Described multiple exit coiled pipe is immersed in the liquid nitrogen of described liquid nitrogen storage chamber, its jet inlet（5）Stretch out casing It is connected outside with abrasive material supply pipe, the part that multiple exit coiled pipe is located in liquid nitrogen storage chamber is connected with multiple jet exit pipes （6）, jet exit pipe（6）The port of export stretch out cooling box（1）Outside to carry out jet processing to work piece, and from jet Entrance（5）More remote jet exit pipe（6）The temperature of the abrasive material of outflow is lower.
- 2. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that described Box Cover Plate（2）It is provided with the observation panel for being used for observing cooling box inner case（4）.
- 3. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that described multiple to penetrate Flow export pipe（6）Can individually, partly or entirely carry out jet processing.
- 4. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that described jet goes out Mouth pipe（6）Equipped with sealing plug（8）And seal cap（9）So that described jet exit pipe（6）It can be sealed in time when not working, it is close Seal plug（8）Insert jet exit pipe（6）In, seal cap（9）Spinning is in jet exit pipe（6）On.
- 5. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that had more in described On mouthful coiled pipe, adjacent two jet exit pipes（6）Between be mounted on cryogenic ball valve（7）, in order to jet exit pipe （6）The control of break-make.
- 6. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that：Described cooler bin Body（1）Tank wall and box cover（2）It is vacuum structure, in cooling box（1）And box cover（2）Outer wrap has foaming Insulation material, so as to realize cooler bin double-layer heat insulation.
- 7. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that：Described multiple exit Coiled pipe is provided with seven jet exits（6）, when abradant jet is from different jet exits（6）During outflow, it is cooled down by liquid nitrogen Time also differs, therefore can obtain the low temperature abradant jet of different temperatures.
- 8. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that：Described abrasive material is penetrated Flow from some jet exit pipe（6）During outflow, remaining jet exit pipe（6）It is in sealing state, jet exit pipe（6） By sealing plug（8）And seal cap（9）Sealed, seal plug（8）Using PCTFE materials, plug is sealed（8）Length it is big In jet exit pipe（6）Locate the length of pipeline, so as to avoid abradant jet from flowing into the pipeline in addition to exit, seal cap（9） With jet exit pipe（6）Using threaded connection, seal cap（9）Structure is identical with nylon self-locking nut, can be extruded by nylon Caused screen resilience is locking afterwards.
- 9. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that：Described multiple exit Coiled pipe is copper pipe, by six cryogenic ball valves（7）It is attached, cryogenic ball valve（7）Open and close to control by rotating valve Close, when abradant jet is from some jet exit pipe（6）During outflow, the cryogenic ball valve before the jet exit（7）All Open, positioned at the jet exit pipe（6）Cryogenic ball valve Close All afterwards, it is ensured that abradant jet can only be from the jet exit pipe （6）Outflow, so as to obtain the low temperature abradant jet of specified temp；Described cryogenic ball valve（7）With jet exit pipe（6）One a pair Should, cryogenic ball valve（7）With corresponding jet exit pipe（6）Between horizontal range be less than 1cm, work as cryogenic ball valve（7）During closing, It can ensure that abradant jet flows directly into corresponding jet exit pipe（6）, reduce the energy loss of abradant jet；Described cooling The box cover of case（2）It can open, cooler bin is connected with multiple exit coiled pipe by the way of welding, therefore multiple exit coiled pipe It is non-dismountable, open box cover（2）Whether observable cooler bin internal structure is damaged, and opens box cover（2）May be used also Maintenance and replacing cryogenic ball valve（7）.
- 10. multiple exit controllable temperature abradant jet cooling device according to claim 1, it is characterised in that：Described has more Mouth coiled pipe designs according to required jet temperature；For different jet temperaturesT F, out , the length that abradant jet flows through in multiple exit coiled pipe is：In formula,hFor convection transfer rate,T w For wall surface temperature,T f For qualitative temperature,lFor duct length,ρFor atmospheric density,c ρ For specific heat at constant pressure,AFor conduit cross-sectional area,vFor jet inlet speed,T f,in For jet inlet temperature,T f,ou t Go out for jet Mouth temperature, take the qualitative temperature that inlet and outlet mean temperature is air.
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| CN201710747740.5A CN107378801B (en) | 2017-08-28 | 2017-08-28 | Multiple exit controllable temperature abradant jet cooling device |
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| CN201710747740.5A CN107378801B (en) | 2017-08-28 | 2017-08-28 | Multiple exit controllable temperature abradant jet cooling device |
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| CN107378801A true CN107378801A (en) | 2017-11-24 |
| CN107378801B CN107378801B (en) | 2019-02-15 |
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Cited By (1)
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| CN112157592A (en) * | 2020-09-29 | 2021-01-01 | 南京航太机电有限公司 | Ultrasonic-assisted ultralow-temperature abrasive gas jet micromachining device for medical polymer PDMS (polydimethylsiloxane) material |
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| CN112157592A (en) * | 2020-09-29 | 2021-01-01 | 南京航太机电有限公司 | Ultrasonic-assisted ultralow-temperature abrasive gas jet micromachining device for medical polymer PDMS (polydimethylsiloxane) material |
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