CN207081256U - A kind of cryogenic treatment apparatus - Google Patents
A kind of cryogenic treatment apparatus Download PDFInfo
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- CN207081256U CN207081256U CN201720896573.6U CN201720896573U CN207081256U CN 207081256 U CN207081256 U CN 207081256U CN 201720896573 U CN201720896573 U CN 201720896573U CN 207081256 U CN207081256 U CN 207081256U
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- liquid nitrogen
- treatment apparatus
- cryogenic
- deep cooling
- cryogenic treatment
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Abstract
Cryogenic treatment apparatus provided by the utility model, original fan design is replaced using liquid gas injection device, cooling down the pressure of working medium liquid nitrogen reduces, speed raises, the parital vacuum formed in liquid gas injection device, introduce fresh air and liquid nitrogen blending is uniform, realize the partial gasification of liquid nitrogen, workpiece is well cooled down after increasing air quantity；Low temperature nitrogen of the driving fluid of injector from deep freeze refrigeration plant box house, is reclaimed to cold therein, can further be improved cooling capacity utilization rate, be avoided frosting and obstructing problem.
Description
Technical field
Cryogenic technique field is the utility model is related to, more particularly, to a kind of cryogenic treatment apparatus.
Background technology
Subzero treatment is that workpiece is placed in the microstructure under specific controllable low temperature environment (less than -100 DEG C), making material
Change, realize a kind of technology of material property lifting.Subzero treatment is for the wearability of portion of material, toughness, hardness, chi
Very little stability, corrosion resistance and service life have different degrees of improvement.Meanwhile subzero treatment can be to complicated shape work
Part is handled, and workpiece surface causes to damage, environment friendly and pollution-free.Cryogenic treatment process is the universal of external heat treatment subsequent treatment
Method, progressively promoted in China.
The equipment that cryogenic treatment apparatus can carry out heating and cooling and insulation according to predetermined process to material.Liquid nitrogen is due to boiling point
Low (- 196 DEG C), cost be low, free of contamination advantage, is subzero treatment working medium the most frequently used at present.The operation principle of deep freeze refrigeration plant
It is：Exchanged heat by the convective heat transfer between workpiece, liquid nitrogen phase transformation and cold nitrogen temperature, workpiece temperature reduce, and realize to workpiece
Cooling.
At present, generally liquid nitrogen is blown into equipment using fan or blower fan in cryogenic treatment apparatus, realized to workpiece
Cooling.The problem of existing be：(1) under low temperature bad working environments there is the problem of high fault rate and short life in fan or blower fan；(2)
Fan or blower fan need extra electric energy input, while is increased according to energy relationship, it is necessary to liquid nitrogen cold makes this part electric energy up
Big liquid nitrogen consumption, (3) because fresh air is difficult to uniform with liquid nitrogen blending, can cause using in the cryogenic treatment apparatus of blower fan
Temperature-controlled precision is deteriorated.
Utility model content
Have in view of that, it is necessary to the defects of existing for prior art, there is provided a kind of energy for reducing cryogenic treatment apparatus
Consumption, improve temperature-controlled precision and strengthen the cryogenic treatment apparatus of equipment dependability.
To achieve the above object, the utility model uses following technical proposals：
A kind of cryogenic treatment apparatus, including be stored with the liquid nitrogen container of high-pressure liquid nitrogen, cryogenic delivery pipe, low temperature regulating valve, liquid-
Gas injection device, deep cooling casing, discharge gas return line, temperature sensor and controller, wherein：
The tank mouth of the liquid nitrogen container is connected to one end of the cryogenic delivery pipe, is installed on the pipeline of the cryogenic delivery pipe
There is the low temperature regulating valve, the low temperature regulating valve is electrically connected at the controller, and the other end of the cryogenic delivery pipe connects
Be connected to the liquid gas ejector, and the liquid gas ejector is arranged in the deep cooling box body, the deep cooling box body phase for
The side of the cryogenic delivery pipe is connected with the discharge gas return line, and the temperature sensor is arranged at the deep cooling casing
It is interior and be electrically connected at the controller.
In some preferred embodiments, the liquid gas ejector includes nozzle, suction room, ejecting port, mixing tube, expansion
Pressure pipe and fluid-mixing outlet, wherein：
One end of the nozzle is connected to the cryogenic delivery pipe, and the other end is contained in the suction interior, the injection
Mouth is installed on the opposite sides of the suction room, and the both ends of the mixing tube are connected to the suction room and the diffusion
Pipe, the fluid-mixing outlet are opened on the diffuser pipe；
High-pressure liquid nitrogen enters the suction room after the nozzle and forms parital vacuum, and by driving fluid from the injection
Mouthful suction, is discharged after the high-pressure liquid nitrogen and driving fluid mixing through the mixing tube and the diffuser pipe, into described
Deep cooling casing.
In some preferred embodiments, the deep cooling casing is stainless steel, and the curb pins of the deep cooling casing
Hard polyurethane foams are filled between layer.
In some preferred embodiments, the discharge gas return line is included described in the inner core and parcel of stainless steel
The heat-preservation cotton insulating barrier of inner core.
In some preferred embodiments, the temperature sensor is used for the temperature for obtaining the deep cooling box house, and
Temperature is back to the controller, the controller passes through high-pressure liquid nitrogen described in low temperature governor valve control described in feedback regulation
Supply.
In some preferred embodiments, the temperature sensor is platinum resistance temperature sensor.
In some preferred embodiments, the platinum resistance temperature sensor can gather -200~200 DEG C of temperature.
In some preferred embodiments, the pressure of the high-pressure liquid nitrogen is 0.6MPa~1.6MPa.
The utility model uses the advantages of above-mentioned technical proposal to be：
On the one hand, cryogenic treatment apparatus provided by the utility model, set using liquid gas ejector instead of original fan
Meter, the pressure of cooling working medium liquid nitrogen reduce, speed rise, the parital vacuum formed in liquid gas ejector, introduce fresh air and liquid nitrogen
Blending is uniform, realizes the partial gasification of liquid nitrogen, and workpiece is well cooled down after increasing air quantity；The driving fluid of injector comes from
The low temperature nitrogen of deep freeze refrigeration plant box house, cold therein is reclaimed, can further improve cooling capacity utilization rate, avoid
Frosting and obstructing problem.
On the other hand, original stop valve is changed to low temperature regulating valve by cryogenic treatment apparatus provided by the utility model, can
Smooth adjustment liquid nitrogen flow, so as to control input cold, realize the control to cooling effect.
Cryogenic treatment apparatus provided by the utility model, under the premise of deep cold treatment apparatus performance is ensured, depth can be simplified
The composition of cold treatment device systems, reduces energy consumption, reduces rate of breakdown.
Brief description of the drawings
Fig. 1 is the structural representation for the cryogenic treatment apparatus that the utility model embodiment provides.
Fig. 2 is the structural representation for the liquid gas ejector that the utility model embodiment provides.
Embodiment
Fig. 1 is refer to, a kind of cryogenic treatment apparatus provided for the utility model embodiment, including：It is liquid nitrogen container (1), low
Warm woven hose (2), low temperature regulating valve (3), liquid gas ejector (4), deep cooling casing (5), discharge gas return line (6), temperature pass
Sensor (7) and controller (8).Wherein：
The tank mouth of the liquid nitrogen container (1) is connected to one end of the cryogenic delivery pipe (2), the cryogenic delivery pipe (2)
The low temperature regulating valve (3) is installed, the low temperature regulating valve (3) is electrically connected at the controller (8), described low on pipeline
The other end of warm woven hose (2) is connected to the liquid gas ejector (4), and the liquid gas ejector (4) is arranged at the depth
In ice chest body (5), the deep cooling casing (5) is connected with the discharge gas relative to the side of the cryogenic delivery pipe (2) and flowed back
Pipeline (6), the temperature sensor (7) are arranged in the deep cooling casing (5) and are electrically connected at the controller (8).
Specifically, the liquid gas ejector (4) includes nozzle (9), suction room (10), ejecting port (13), mixing tube
(11), diffuser pipe (12) and fluid-mixing outlet (14).Wherein：
One end of the nozzle (9) is connected to the cryogenic delivery pipe (2), and the other end is contained in suction room (10)
Interior, the ejecting port (13) is installed on the opposite sides of suction room (10), and the both ends of the mixing tube (11) connect respectively
In suction room (10) and the diffuser pipe (12), fluid-mixing (15) outlet is opened on the diffuser pipe (12).
Specifically, high-pressure liquid nitrogen enters low temperature regulating valve (3) from liquid nitrogen container (1) through cryogenic delivery pipe (2), is adjusted by low temperature
Valve (3) and liquid gas ejector (4) deep cooling casing (5) is saved, liquid gas ejector (4) is using liquid nitrogen as working fluid, high-pressure liquid nitrogen
Enter the suction room after the nozzle and form parital vacuum, uniformly blended with the air of ejecting port (13) suction, liquid nitrogen warp
Crossing liquid gas ejector (4), pressure reduces afterwards, speed increase, is uniformly blended with the air of ejecting port (13) suction, part liquid nitrogen liquid
Change, workpiece in case is cooled down into deep cooling casing (5).
It is appreciated that cryogenic treatment apparatus provided by the utility model, original wind is replaced using liquid gas ejector (4)
Fan design, the pressure of cooling working medium liquid nitrogen reduce, speed rise, the parital vacuum formed in liquid gas ejector (4), introduce new
Wind and liquid nitrogen blending are uniform, realize the partial gasification of liquid nitrogen, workpiece is well cooled down after increasing air quantity.
Further, the driving fluid of liquid gas ejector (4) is from the internal low temperature nitrogen of deep cooling casing (5), to wherein
Cold reclaimed, can further improve cooling capacity utilization rate, avoid frosting and obstructing problem.
Preferably, the deep cooling casing (5) is stainless steel, and is filled out between the inside and outside interlayer of the deep cooling casing (5)
It is good filled with hard polyurethane foams, heat-insulating property.
Preferably, the discharge gas return line (6) includes the insulation of the inner core and the parcel inner core of stainless steel
Cotton insulating barrier, so as to improve the sealing of discharge gas return line (6).
Preferably, the temperature sensor (7) is used for the temperature for obtaining the inside of the deep cooling casing (5), and by temperature
The controller (8) is back to, the controller (8) controls the high pressure liquid by low temperature regulating valve (3) described in feedback regulation
The supply of nitrogen.It is appreciated that original stop valve is changed to low temperature regulating valve (3) by the utility model, can smooth adjustment liquid nitrogen
Flow, realize fluid flow steady excessive, ensure that the stabilization of injector working condition, realize the control to cooling effect.
It is appreciated that obtaining the temperature signal of the internal temperature measuring point of deep cooling casing (5) by temperature sensor (7), and return
To controller (8), controller (8) increase or reduces liquid nitrogen supply by the aperture of feedback regulation low temperature regulating valve (3), from
And the input of cold is controlled, realize the accurate control of the temperature in deep cooling casing (5).
The workflow of cryogenic treatment apparatus provided by the utility model is as follows：
Step 110：Pending workpiece, closed box are placed in deep cooling casing (5) case；
Step 120：Corresponding temperature lowering curve is set on controller (8) according to technological requirement；
Step 130：The provider switch of liquid nitrogen container (1) is opened, opens cryogenic treatment apparatus master switch；
Step 140：High-pressure liquid nitrogen (0.6MPa~1.6Mpa) enters cryogenic delivery pipe (2) from liquid nitrogen container (1), flows through low temperature
Reduced after regulating valve (3) and liquid gas ejector (4) in nozzle (9) outlet pressure, speed rise, it is local to suck indoor formation
Vacuum (10~30KPa of negative pressure), driving fluid (low temperature nitrogen) are inhaled into, and low temperature nitrogen and liquid nitrogen mixing carry out heat exchange,
Mixing tube (11), diffuser pipe (12) are flowed through, deep cooling casing (5) inside, cooling down workpiece are entered in the form of two-phase；
Step 150：By temperature sensor monitors workpiece temperature in deep cooling box, and it is compared, passes through with predetermined process
Low temperature regulating valve is adjusted controller.When rate of temperature fall crosses speed, low temperature control valve opening is tuned up, then liquid nitrogen flow increases
Greatly, input cold increases, and rate of temperature fall accelerates；When rate of temperature fall is crossed quickly, low temperature control valve opening is turned down, then liquid nitrogen flow
Subtract big, input cold reduction, rate of temperature fall is slack-off；
Step 160：Aperture by controller (8) by feedback regulation low temperature regulating valve (3), increase or reduction liquid nitrogen supply
Ying Liang, so as to control the input of cold, the accurate control of the temperature in deep cooling casing (5) is realized, after completing given process, opened
Deep cooling casing (5), takes out workpiece, and cryogenic treatment process is completed.
Cryogenic treatment apparatus processing method provided by the utility model, can under the premise of deep cold treatment apparatus performance is ensured
To simplify the composition of deep cold treatment apparatus and workflow, energy consumption is reduced, reduces rate of breakdown.
Certain cryogenic treatment apparatus of the present utility model can also have a variety of conversion and remodeling, it is not limited to above-mentioned implementation
The concrete structure of mode.In a word, the scope of protection of the utility model should include those to those skilled in the art
Obvious conversion substitutes and retrofited.
Claims (8)
1. a kind of cryogenic treatment apparatus, it is characterised in that liquid nitrogen container, cryogenic delivery pipe, low temperature including being stored with high-pressure liquid nitrogen
Regulating valve, liquid gas ejector, deep cooling casing, discharge gas return line, temperature sensor and controller, wherein：
The tank mouth of the liquid nitrogen container is connected to one end of the cryogenic delivery pipe, is installed on the pipeline of the cryogenic delivery pipe
Low temperature regulating valve is stated, the low temperature regulating valve is electrically connected at the controller, and the other end of the cryogenic delivery pipe is connected to
The liquid gas ejector, and the liquid gas ejector is arranged in the deep cooling box body, the deep cooling box body phase is for described
The side of cryogenic delivery pipe is connected with the discharge gas return line, the temperature sensor be arranged in the deep cooling box body and
It is electrically connected at the controller.
2. cryogenic treatment apparatus according to claim 1, it is characterised in that the liquid gas ejector includes nozzle, suction
Room, ejecting port, mixing tube, diffuser pipe and fluid-mixing outlet, wherein：
One end of the nozzle is connected to the cryogenic delivery pipe, and the other end is contained in the suction interior, the ejecting port peace
Opposite sides loaded on the suction room, the both ends of the mixing tube are connected to the suction room and the diffuser pipe, institute
Fluid-mixing outlet is stated to be opened on the diffuser pipe；
High-pressure liquid nitrogen enters the suction room after the nozzle and forms parital vacuum, and driving fluid is inhaled from the ejecting port
Enter, discharged after the high-pressure liquid nitrogen and driving fluid mixing through the mixing tube and the diffuser pipe, into the deep cooling
Casing.
3. cryogenic treatment apparatus according to claim 1, it is characterised in that the deep cooling casing is stainless steel, and
Hard polyurethane foams are filled between the inside and outside interlayer of the deep cooling casing.
4. cryogenic treatment apparatus according to claim 1, it is characterised in that the discharge gas return line includes stainless steel
The inner core of material and the heat-preservation cotton insulating barrier of the parcel inner core.
5. cryogenic treatment apparatus according to claim 1, it is characterised in that the temperature sensor is used to obtain the depth
The temperature of cold box house, and temperature is back to the controller, the controller adjusts the low temperature according to temperature feedback
The supply of high-pressure liquid nitrogen described in governor valve control.
6. cryogenic treatment apparatus according to claim 1, it is characterised in that the temperature sensor passes for platinum resistance temperature
Sensor.
7. cryogenic treatment apparatus according to claim 6, it is characterised in that the platinum resistance temperature sensor can gather-
200~200 DEG C of temperature.
8. cryogenic treatment apparatus according to claim 1, it is characterised in that the pressure of the high-pressure liquid nitrogen be 0.6MPa~
1.6MPa。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720896573.6U CN207081256U (en) | 2017-07-21 | 2017-07-21 | A kind of cryogenic treatment apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720896573.6U CN207081256U (en) | 2017-07-21 | 2017-07-21 | A kind of cryogenic treatment apparatus |
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| Publication Number | Publication Date |
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| CN207081256U true CN207081256U (en) | 2018-03-09 |
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| CN201720896573.6U Active CN207081256U (en) | 2017-07-21 | 2017-07-21 | A kind of cryogenic treatment apparatus |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345729A (en) * | 2017-07-21 | 2017-11-14 | 中国科学院理化技术研究所 | A kind of cryogenic treatment apparatus |
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2017
- 2017-07-21 CN CN201720896573.6U patent/CN207081256U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345729A (en) * | 2017-07-21 | 2017-11-14 | 中国科学院理化技术研究所 | A kind of cryogenic treatment apparatus |
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