CN201338361Y - Supercritical fluid foaming agent conveying device - Google Patents
Supercritical fluid foaming agent conveying device Download PDFInfo
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- CN201338361Y CN201338361Y CNU2009200671833U CN200920067183U CN201338361Y CN 201338361 Y CN201338361 Y CN 201338361Y CN U2009200671833 U CNU2009200671833 U CN U2009200671833U CN 200920067183 U CN200920067183 U CN 200920067183U CN 201338361 Y CN201338361 Y CN 201338361Y
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Abstract
The utility model relates to a device for pre-manufacturing a supercritical fluid foaming agent and controlling conveying flow rate and a control method, in particular to a system for preparing supercritical fluid foaming agent fluid and accurately controlling conveying flow rate when nitrogen or carbon dioxide with a supercritical state is adopted as foaming agents for processing foam plastics; the system mainly comprises a low-pressure gas source 1, a high-pressure diaphragm compressor 2, a high-pressure vessel 4, and a foaming agent lead-in interface 16 arranged on the machine cylinder of an extruder, a foaming agent conveying pipeline which is formed by sequentially connecting pressure pipelines, a foaming agent supercritical state keeping device which is formed by elements such as a heating device 3 and the like which are coated on the high-pressure vessel 4, and a control part. The system has the advantages that: the system can be used for pressurizing and heating the low-pressure gas of the foaming agent and keeping a supercritical state, and then according to given flow rate of the foaming agents which is poured in a processing device and temperature value, closed-loop is adopted for controlling the flow rate and temperature of the foaming agent gas, so as to accurately and uniformly lead the flow rate of the foaming agent needed by a foaming process to be led in polymer.
Description
Technical field
The utility model relates to the device of the flow that a kind of prefabricating supercritical fluid blowing agent and control carries, and prepares the supercritical foaming agent fluid and the accurate system of control feed flow when relating more specifically to adopt the nitrogen of supercriticality or carbon dioxide as blowing agent processing thermoplastic foamed plastics.
Background technology
According to disclosed document and general knowledge, nitrogen or carbon dioxide are difficult to dissolve in and are mixed in the thermoplastic polymer of fusion under low-pressure state, are difficult to obtain needed foaming product.But the nitrogen (critical-point pressure 3.35MPa, temperature-147 ℃) or the carbon dioxide (critical-point pressure 7.4MPa, 31.24 ℃ of temperature) that are in supercriticality have bigger compatibility with molten polymer.And along with the raising of pressure, solubility can further increase.After mixing in the molten polymer and dissolving enough supercritical fluid aerating powders, quick step-down or be rapidly heated when extruding just can obtain the foaming product of needs.But when producing continuously, in order to obtain stable goods, except the technological parameter of control extruder was stable, the important factor of another one was the stability that is injected into the flow of the supercritical fluid aerating powder in the extruder melten gel.Flowed fluctuation is big, will cause foaming quality instability.
When known employing gas physical blowing agent processing foamed product, method commonly used be with foaming agent gas directly from gas bomb or after boosting to certain pressure with joining the barrel of extruder behind the pressure-reducing valve stable output pressure.When adopting this kind method, the pressure oscillation meeting of the molten resin in the extruder barrel causes the changes in flow rate that is injected in the processing unit (plant), even when being higher than gas pressure, the pressure of molten polymer can not inject blowing agent, the dosage conveying capacity that can cause like this foaming is inhomogeneous, thereby causes the quality instability of foaming product.As the Chinese patent literature publication number is among the CN1102490C, disclosed the method for implanting of a kind of supercritical carbon dioxide as blowing agent, this method has solved some problems of injecting the liquid carbon dioxide blowing agent, yet the document does not disclose the metering and the injection problem of gaseous carbon dioxide blowing agent, and does not disclose fluctuation problem that is injected into blowing agent flow in the polymer that causes when solving the polymer melt pressure oscillation and the unsettled method of being carried by the blowing agent that the fluctuation of pumping gap causes yet; What the scheduled volume pump that is adopted needed that refrigerant keeps pumping is liquid carbon dioxide, and a large amount of energy of whole process need consumption is finished injection process (comprise compression arbon dioxide to liquid, liquid pumping is heated to supercriticality); In these processes, unavoidably make carbon dioxide receive the pollution of lubricant medium; Concerning nitrogen, (147oC), this method is more infeasible because condensing temperature is very low.In addition, the Chinese patent literature publication number is a kind of blowing agent metering system and the method for having proposed in the CN1446145A file, and the control method that embodies in the document is adopt to measure the pressure differential at fixed orifice two ends and regulate the pressure of throttle orifice front end and keep the stable of flow velocity for keeping default pressure reduction.Yet when adopting this method, on the one hand, flow and pressure reduction relation are not linear relationships, and with absolute pressure and fluid temperature (F.T.) relation are arranged also, thereby only to consider to change pressure reduction be to be difficult to accurately control flow; On the other hand, fixing throttle orifice only can be at a narrow scope inner control flow, after exceeding this scope, and the flow measurement instability; And in the disclosure file blowing agent source situation and metering process situation are failed to clearly define, flow-control is by substantial effect to these factors to blowing agent, and is special under the situation of carbon dioxide as blowing agent; Thereby the disclosed technology of this patent application obviously has limitation in application facet.
Summary of the invention
The utility model purpose is the problem according to above-mentioned the deficiencies in the prior art and existence, adopt the method for low energy consumption, gas foaming agent (as nitrogen, carbon dioxide etc.) boosted and remain on the supercriticality that needs, and by simultaneously output flow and output temperature being carried out closed-loop control, can guarantee when melt pressure significantly changes, to keep flow fully stable, by regulating and the locking choke valve, accurately control flow, the foaming effect that obtains to expect and the stable foaming product quality of output in realizing on a large scale.
The purpose of this utility model realizes being finished by following technical scheme:
A kind of supercritical fluid aerating powder conveying device described in the utility model and control method mainly comprise:
A) low pressure gas body source 1, autoclave diaphragm compressor 2, high-pressure bottle 4, high-pressure stop valve 7, high pressure servo valve 10, adjustable joint choke valve 12, be installed in blowing agent on the extruder barrel and introduce the blowing agent transfer pipeline that interface 16 is connected to form by pressure pipeline successively;
B) by being coated with heater 3, being installed in the blowing agent supercriticality holding device that pressure sensor 300 among the high-pressure bottle 4 and temperature sensor 301, temperature control module 5, power switch 6 are formed on the high-pressure bottle 4;
C) by the pressure sensor 302 and 304 that is installed in adjustable joint choke valve 12 input ports and delivery outlet, be installed in adjustable joint choke valve 12 input ports temperature sensor 303 before, be coated on the heater 11 on the pressure pipeline between high pressure servo valve 10 and the adjustable joint choke valve 12, power switch 13, control pressure-reducing valve 8 and the electromagnetic proportional valve 9 that the gas access is connected with high pressure servo valve 10 guides, data are handled and control module 14, operation interface 15, and the control section of pressure pipeline and electric wire composition.
Wherein pressure sensor 300 is connected with autoclave diaphragm compressor 2, and the running that triggers control autoclave diaphragm compressor 2 carries blowing agent in high-pressure bottle 4, and pressure in the high-pressure bottle 4 is remained within the pressure limit on the supercriticality pressure; Wherein temperature sensor 301 is connected with temperature control module 5, temperature control module 5 is connected with power switch 6 by cable and controls the open and close of power switch 6 and heater 3 work, and blowing agent temperature in the high-pressure bottle 4 is remained within the temperature range on the supercritical temperature; Wherein pressure-reducing valve 8 is connected with electromagnetic proportional valve 9, the delivery outlet of electromagnetic proportional valve 9 is controlled the gas access with the guide of high pressure servo valve 10 and is connected, and electromagnetic proportional valve 9 is connected with a delivery outlet of control module 14 by communication cable and data processing and is subjected to the control signal of data processing and control module 14 to regulate the pressure that the guide who exports controls gas; Wherein can be connected with the inlet of pressure-reducing valve 8 and obtain the guide and control gas, or the inlet of pressure-reducing valve 8 is connected with the compressed air line of working site obtains the guide and control gas by on the pressure pipeline between high pressure servo valve 10 and the high-pressure stop valve 7, drawing a gas branch road; Wherein pressure sensor 302 and temperature sensor 303 are arranged among the pressure pipeline between heater 11 and adjustable joint choke valve 12 inlets, and pressure sensor 304 is arranged on adjustable joint choke valve 12 outlets and is installed between the introducing interface 16 on the extruder barrel; Wherein pressure sensor 302 and 304, temperature sensor 303 are handled with data and are connected with the input port of control module 14, and with actual detected to the temperature value of supercritical fluid aerating powder and force value feed back to data and handle and control module 14, wherein data are handled with control module 14 and operation interface 15 and are connected by communication cable, and are connected with the control signal mouth of power switch 13 and electromagnetic proportional valve 9.
The utility model has the advantages that, the low-pressure gas that the utility model can be used for can be used as blowing agent pressurizes and heats and remain on a supercriticality, then according to blowing agent flow and the temperature value set to the processing unit (plant) injection, adopt the flow and the temperature of closed-loop control foaming agent gas, accurately and equably that foam process is required blowing agent flow is introduced in the polymer.
Description of drawings
Accompanying drawing 1 is the utility model system architecture schematic diagram;
Accompanying drawing 2 is the user mode schematic diagram of a kind of extrusion foaming of the present utility model;
Accompanying drawing 3 is the user mode schematic diagram of a kind of injection foaming of the present utility model.
The specific embodiment
The utility model feature and correlated characteristic thereof are described further by embodiment below in conjunction with accompanying drawing:
As accompanying drawing 1,2, shown in 3, wherein label 1-31 represents respectively, 1-low pressure gas body source, 2-autoclave diaphragm compressor, the 3-heater, the 4-high-pressure bottle, the 5-temperature control module, the 6-power switch, the 7-high-pressure stop valve, the 8-pressure-reducing valve, the 9-electromagnetic proportional valve, the 10-high pressure servo valve, the 11-heater, 12-is adjustable joint choke valve, the 13-power switch, the 14-data are handled and control module, the 15-operation interface, 16-extruder blowing agent is introduced interface, the 17-screw rod, the 18-barrel, the 300-pressure sensor, the 302-pressure sensor, the 304-pressure sensor, the 301-temperature sensor, the 303-temperature sensor; 101,102,201,202-heater power source Wiring port; 19-charge door, 20-extruder drive unit, 21-converting interface, 22-Melt Pump, 23-extrusion neck ring mold, 24-storage device, 25-supercharging injection device, 26-check valve, 27-needle valve injection nozzle, 28-injection forming mold.
Show as accompanying drawing 1,2,3, the utility model system comprises by low pressure gas body source 1, autoclave diaphragm compressor 2, heater 3, high-pressure bottle 4, temperature control module 5, power switch 6 and 13, high-pressure stop valve 7, high-pressure pressure-reducing valve 8, electromagnetic proportional valve 9, high pressure servo valve 10, heater 11, adjustable joint choke valve 12, pressure sensor 300,302 and 304, temperature sensor 301 and 303, data processing and control module 14, operation interface 15, and the pressure pipeline and communication wire or the cable composition that connect above-mentioned parts;
To be described in detail below.
Said apparatus can be divided into two parts below will describing in detail by possible installing space position, one of them part prefabricating supercritical fluid blowing agent, can be installed in position, also can be installed in position near foaming equipment (for example extruder, injection machine etc.) away from foaming equipment (for example extruder, injection machine etc.); The supercritical fluid aerating powder flow that another part control is carried need be installed in the position near foaming equipment (for example extruder, injection machine etc.).Two parts of the utility model device connect by pressure pipeline, and when device work, high-pressure stop valve 7 wherein is shown in an open position.Further be that a prefabricating supercritical fluid blowing agent part can only partly be connected with the supercritical fluid aerating powder flow that a control is carried, and also can partly be connected with the supercritical fluid aerating powder flow that a plurality of controls are carried simultaneously.
Pressure pipeline and communication wire or cable composition that prefabricating supercritical fluid blowing agent in the described utility model device partly comprises low pressure gas body source 1, autoclave diaphragm compressor 2, high-pressure bottle 4, high-pressure stop valve 7, heater 3, temperature control module 5, temperature sensor 301, power switch 6 and connects above-mentioned parts; Wherein, low pressure gas body source 1, autoclave diaphragm compressor 2, high-pressure bottle 4, high-pressure stop valve 7 connect successively by pressure pipeline, and heater 3 is coated on the high-pressure bottle 4; Temperature control module 5 bases are installed in the actual temperature of the temperature sensor 301 detected blowing agents among the high-pressure bottle 4 and the supercritical fluid temperature of setting is controlled the open and close of power switch 6 and the operation of heater, wherein low pressure gas body source 1 can be proper Operation of Industrial bottled gas (nitrogen or a carbon dioxide), its outlet pressure, for example 5 clings to a pressure between 9 crust at normal pressure (1 crust); Also can be the high-purity nitrogen (for example purity is 99.9% nitrogen) of directly purifying from air with the low-pressure nitrogen generator, outlet pressure be at 4 pressure that cling between 9 crust, for example 6 crust.Autoclave diaphragm compressor 2 will be from the foaming agent gas in low-pressure gas source 1, boosts to 150 and clings to a pressure between 600 crust and be stored in the high-pressure bottle 4.Owing to isolate fully by metallic membrane between hydraulic oil and the gas during diaphragm type compressor compression, thereby in the process of boosting, gas foaming agent has been avoided oily pollution fully, thereby foaming agent gas can be used for the manufacturing of the foam package material and the goods of packaging for foodstuff goods.Though known pneumatic booster pump or electric booster pump also can be used for this purpose, because high energy consumption, and inevitably parts wear also can reduce quantity-produced stability, and therefore employing is not arranged in this programme.Because generate heat in process is boosted in the gas compression, gas outlet temperature can be far above 31 ℃.So no matter carbon dioxide, or nitrogen is transported to that foaming agent gas has been in supercriticality in the high-pressure bottle 4.In use and production line process, in order to keep the foaming agent gas in the high-pressure bottle 4 to be in supercriticality, on high-pressure bottle 4, coat a heater 3, temperature sensor 301 and pressure sensor 300 are set in the high-pressure bottle 4, temperature control module 5 receives the actual temperature signal that temperature sensor 301 transmits, the break-make of the concurrent number of delivering letters control power switch 6, and pressure sensor 300 sends the pressure of surveying to autoclave diaphragm compressor 2 and trigger the startup of autoclave diaphragm compressor 2 and stop temperature range (for example 35 ℃ to 45 ℃) that is higher than the super critical point temperature of setting in temperature control module 5.Heater 3 is connected with the AC power of 220V with 102 by Wiring port 101, and when gas temperature was reduced to lower bound (for example 35 ℃) in detecting high-pressure bottle 4, temperature control module 5 sent signal and gives power switch 6, makes it UNICOM and begins heating; When gas temperature is elevated to high limit (for example 45 ℃) in detecting high-pressure bottle 4, temperature control module 5 sends signal and gives power switch 6, make it to disconnect and stop to heat, the pressure of the supercritical fluid aerating powder in the high-pressure bottle 4 also will remain on the super critical point pressure and satisfy follow-up flow control section pressure fully within the pressure limit of needs, for example 200 cling between 350 crust.Along with follow-up flow control section and forming production line consume the foaming machine fluid, blowing agent pressure can descend in the high-pressure bottle 4; The blowing agent pressure that detects in the high-pressure bottle when pressure sensor 350 is reduced to lower bound pressure (for example 200 crust), compressor 2 will start and continue the conveying foaming agent gas in high-pressure bottle 4, blowing agent pressure in high-pressure bottle reaches high pressure limiting power (for example 350 crust), and 2 on compressor stops.By said apparatus, the blowing agent in the high-pressure bottle 4 will remain on the supercriticality that needs always, guarantee that the consumption of foaming equipment needs.
The supercritical fluid aerating powder flow part that control in the above-mentioned utility model device is carried, comprise pressure-reducing valve 8, electromagnetic proportional valve 9, high pressure servo valve 10, heater 11, adjustable joint choke valve 12, pressure sensor 302 and 304, temperature sensor 303, data processing and control module 14, operation interface 15, power switch 13 and the pressure pipeline and communication wire or the cable composition that connect above-mentioned parts; Wherein high pressure servo valve 10, adjustable joint choke valve 12, be connected in series with pressure pipeline in order, the pressurized gas inlet of high pressure servo valve 10 is connected with the outlet of above-mentioned high-pressure stop valve 7.Control gas source about the guide who controls high pressure servo valve 10 two kinds of sources are arranged, wherein a kind of is to draw a gas branch road to pressure-reducing valve 8 from the pressure piping between high-pressure stop valve 7 and the high pressure servo valve 10, post-decompression gas is connected to electromagnetic proportional valve 9, electromagnetic proportional valve 9 is according to handling from data and the control signal of control module 14 is further regulated the guide who is transported to high pressure servo valve 10 and controlled gas pressure, and another is that direct gas access with pressure-reducing valve 8 is connected with the compressed air line of production scene and obtains source of the gas; Wherein on the pipeline between high pressure servo valve 10 and the adjustable joint choke valve 12, coat heater 11, and a pressure sensor 302 and a temperature sensor 303 be set on the pressure pipeline between heater and the adjustable joint choke valve 12, at the delivery outlet of adjustable joint choke valve 12 and use on the pipeline between the introducing interface 16 on the extruder barrel of supercritical fluid aerating powder a pressure sensor 304 is set; Wherein pressure sensor 302 and 304, temperature sensor 303 are handled with data and are connected with control module 14, with actual detected to the temperature value and the force value gas of supercritical fluid aerating powder feed back to data processing and control module 14; Wherein operation interface 15 and data are handled with control module 14 and are connected by communication cable; Wherein heater 11 is connected with the 220V AC power with 202 by Wiring port 201, data processing and control module 14 are according to the temperature value of temperature sensor 303 actual measurements and temperature value and the disconnection of temperature fluctuation range control power switch 13 and the operation of setting by operation interface 15 of connecting control heater 11, so that the temperature of blowing agent fully is stabilized within the temperature range of hope.
Before using the flow-control part of supercritical fluid foaming, need be according to the technological parameter of extruder when carrying out foaming production, plasticizing capacity for example, the injection range of flow of the supercritical fluid aerating powder that coaptations such as glue laminated are required, inject the pressure limit of blowing agent and the temperature range of injecting blowing agent, according to these parameters, at first adjustable joint choke valve 12 is carried out range of flow and regulate and use flow meter calibration, after the enough big so that measure error of pressure sensor 302 and 303 of the pressure reduction that makes adjustable joint choke valve 12 rear and front ends in the range of flow of hope can not influence the accuracy rating (for example+/-1%) of flow, lock the position of adjustable joint choke valve, and determine rational flow rate calculation coefficient.Then by operation interface 15 input flow rate design factors, the flow value of supercritical fluid aerating powder and the temperature value and the temperature fluctuation range of supercritical fluid aerating powder.
According to above-mentioned system of the present utility model is described, connect into a complete supercritical fluid aerating powder conveying device by above-mentioned method, then with the output port of adjustable throttling 12 by pipeline with after introducing interface 16 on being installed in extruder barrel 18 is connected, just can supercritical fluid aerating powder accurately be injected in the screw rod 17 and the molten polymer between the barrel 18 of extruder according to the method that describes below:
1) will be from the low pressure foaming agent gas in low-pressure gas source 1, process autoclave diaphragm compressor 2 boosts and is transported in the high-pressure bottle 4, make the pressure of blowing agent in the high-pressure bottle 4 keep a pressure limit on the supercritical pressure, for example at 100 crust between 600 crust; Preferably between 150 crust cling to 450; More preferably cling between 350 crust 200;
2) detect the blowing agent actual pressure and feed back to autoclave diaphragm compressor 2 by the pressure sensor 300 that is installed among the high-pressure bottle 4, autoclave diaphragm compressor 2 is according to 1) in the pressure limit determined and the blowing agent pressure of actual detected determine to start and stop to keep blowing agent pressure 1) in determine within the scope;
3) on/off of the power switch 6 by temperature control module 5, control heater 3 work that comes control heater 3, thereby foaming agent fluid in the high-pressure bottle 4 is within the temperature range on the supercriticality temperature, for example between 35 ℃ to 45 ℃;
4) set flow value, temperature value and the temperature fluctuation range of a supercritical fluid aerating powder and the flow rate calculation coefficient of input system by operation interface 15;
5) data processing and control module 14 are controlled the work that power switch 13 comes control heater 11 according to temperature sensor 303 detected real fluid temperature values and temperature fluctuation range, and then the control fluid temperature (F.T.) fully is stabilized within the range of set temperature; And according to temperature sensor 303 detected real fluid temperature values, calculate actual flow value with the pressure sensor 302 and the 304 detected actual pressure value at adjustable joint choke valve 12 two ends, with set flow value relatively after, come the guide of control ratio magnetic valve 9 outputs to control the output pressure that gas pressure is regulated high pressure servo valve 8 according to flow deviation, make the actual flow value and set the abundant match of flow value.
Further specify in the specific embodiment of giving an example below.
Embodiment,
As shown in Figure 2, the utility model system is used for continuous foam shaping by extrusion sheet material.Used make-up machine is that screw rod 17 diameters are 100 millimeters single screw extrusion machine, and draw ratio is roughly 26D.Materials flow end at extruder has increased a Melt Pump 22, its objective is in order to improve and stablize the pressure of foaming mouthful mould 23 porch melten gel/blowing agent blends.Material processed is PP (polypropylene), when not carrying out foaming, designed productive capacity is 200 kilograms/hour, in the present embodiment, from the position of the about 15D in the downstream of charge door 19, introduce interface (16) at three blowing agents of radial equipartition of barrel (18), this place's resin melts, introduce the delivery outlet that interfaces (16) are connected to the adjustable joint choke valve 12 of the utility model device after with the high-voltage tube parallel connection, formed an extrusion foaming system for these three.
At first extruder is extruded output and be set in 150 kilograms/hour, shaped article is that thickness is the sheet material of 3mm, and the final products density requirements is at 0.2-0.3g/cm
3For realizing such foaming effect, adopt carbon dioxide as blowing agent.Default and timing signal are about 100 crust by melten gel pressure and consider.In view of the above, calculate that the flow of carbon dioxide foaming agent is greatly about 30 standard liter/min.According to this roughly flow value and melten gel pressure, regulate adjustable joint choke valve 12, make actual flow when 30 standard liter/min, the pressure reduction at choke valve two ends surpasses 50 crust, between 50 crust and 60 crust.Lock choke valve then, the temperature (as 60 ℃) and the temperature range (+/-3 ℃) of system-computed coefficient, flow value (30L/ minute), supercritical foaming agent fluid is input in the system by operation interface 15; According to such working pressure, the pressure limit of high-pressure bottle 4 is set in 250 scopes of clinging to 300 crust, temperature range is set in 35 ℃ to 45 ℃ scope; Autoclave diaphragm compressor 2 will start and stop according to the pressure limit of setting; 1 of low pressure gas body source adopts the proper Operation of Industrial bottled carbon dioxide.In implementation process, set as the front parameter, only obtaining to stablize proportion is 0.5g/cm
3Foam sheet.Further by improving melten gel pressure to 150 crust in the extruder, with will inject flow set to 50 mark by operation interface 15 and rise/minute, system will regulate automatically according to blowing agent flow of the injection of the variation of the melten gel pressure in the barrel, setting (50 marks rise/minute) and temperature range (60 ℃+/-3 ℃), focus on that to stablize proportion be 0.3g/cm thereby obtain stabilization ratio
3Foam sheet.
Though below design and embodiment according to the utility model purpose have been done to elaborate with reference to accompanying drawing; but those of ordinary skills can recognize; under the precondition that does not break away from the claim limited range; still can make various improvement and conversion to the utility model, and this improvement and conversion still should belong to protection domain of the present utility model.
Claims (5)
1. supercritical fluid aerating powder conveying device is characterized in that, mainly comprises:
A) low pressure gas body source (1), autoclave diaphragm compressor (2), high-pressure bottle (4), high-pressure stop valve (7), high pressure servo valve (10), adjustable joint choke valve (12), be installed in blowing agent on the extruder barrel and introduce the blowing agent transfer pipeline that interface (16) is connected to form by pressure pipeline successively;
B) by being coated with heater (3), being installed in the blowing agent supercriticality holding device that pressure sensor (300) among the high-pressure bottle (4) and temperature sensor (301), temperature control module (5), power switch (6) are formed on the high-pressure bottle (4);
C) by the pressure sensor (302) and (304) that are installed in adjustable joint choke valve (12) input port and delivery outlet, be installed in adjustable joint choke valve (12) input port temperature sensor (303) before, be coated on the heater (11) on the pressure pipeline between high pressure servo valve (10) and the adjustable joint choke valve (12), power switch (13), control pressure-reducing valve (8) and the electromagnetic proportional valve (9) that the gas access is connected with high pressure servo valve (10) guide, data are handled and control module (14), operation interface (15), and the control section of pressure pipeline and electric wire composition.
2. supercritical fluid aerating powder conveying device according to claim 1, it is characterized in that, wherein pressure sensor (300) is connected with autoclave diaphragm compressor (2), and the running that triggers control autoclave diaphragm compressor (2) carries blowing agent in high-pressure bottle (4), and pressure in the high-pressure bottle (4) is remained within the pressure limit on the supercriticality pressure.
3. supercritical fluid aerating powder conveying device according to claim 1, it is characterized in that, wherein temperature sensor (301) is connected with temperature control module (5), temperature control module (5) is connected with power switch (6) by cable and controls the open and close of power switch (6) and heater (3) work, and blowing agent temperature in the high-pressure bottle (4) is remained within the temperature range on the supercritical temperature.
4. supercritical fluid aerating powder conveying device according to claim 1, it is characterized in that, wherein pressure-reducing valve (8) is connected with electromagnetic proportional valve (9), the delivery outlet of electromagnetic proportional valve (9) is controlled the gas access with the guide of high pressure servo valve (10) and is connected, and electromagnetic proportional valve (9) is connected with a delivery outlet of control module (14) by communication cable and data processing and is subjected to the control signal of data processing and control module (14) to regulate the pressure that the guide who exports controls gas; Wherein can be connected with the inlet of pressure-reducing valve (8) and obtain the guide and control gas, or the inlet of pressure-reducing valve (8) is connected with the compressed air line of working site obtains the guide and control gas by on the pressure pipeline between high pressure servo valve (10) and the high-pressure stop valve (7), drawing a gas branch road.
5. supercritical fluid aerating powder conveying device according to claim 1, it is characterized in that, wherein pressure sensor (302) and temperature sensor (303) are arranged among the pressure pipeline between heater (11) and adjustable joint choke valve (12) inlet, and pressure sensor (304) is arranged on adjustable joint choke valve (12) and exports and be installed between the introducing interface (16) on the extruder barrel; Wherein pressure sensor (302) is handled with data with (304), temperature sensor (303) and is connected with the input port of control module (14), and with actual detected to the temperature value of supercritical fluid aerating powder and force value feed back to data and handle and control module (14), wherein data are handled and are connected by communication cable with operation interface (15) with control module (14), and are connected with the control signal mouth of power switch (13) with electromagnetic proportional valve (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2009200671833U CN201338361Y (en) | 2009-01-20 | 2009-01-20 | Supercritical fluid foaming agent conveying device |
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| CNU2009200671833U CN201338361Y (en) | 2009-01-20 | 2009-01-20 | Supercritical fluid foaming agent conveying device |
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| CN201338361Y true CN201338361Y (en) | 2009-11-04 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310515A (en) * | 2011-06-02 | 2012-01-11 | 中国科学院宁波材料技术与工程研究所 | Constant-pressure constant-flow injection device of micro-flow high-pressure liquefied gas |
| CN102310516A (en) * | 2011-08-30 | 2012-01-11 | 中国科学院宁波材料技术与工程研究所 | Injection apparatus for supercritical fluid |
| CN104275766A (en) * | 2013-07-11 | 2015-01-14 | 宁波大学 | Device for trapping and recycling supercritical fluid during mould pressing foaming process |
| CN112167989A (en) * | 2019-07-02 | 2021-01-05 | B/E航空公司 | Heated fluid feedback control system for a beverage maker |
-
2009
- 2009-01-20 CN CNU2009200671833U patent/CN201338361Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102310515A (en) * | 2011-06-02 | 2012-01-11 | 中国科学院宁波材料技术与工程研究所 | Constant-pressure constant-flow injection device of micro-flow high-pressure liquefied gas |
| CN102310516A (en) * | 2011-08-30 | 2012-01-11 | 中国科学院宁波材料技术与工程研究所 | Injection apparatus for supercritical fluid |
| CN102310516B (en) * | 2011-08-30 | 2014-06-04 | 中国科学院宁波材料技术与工程研究所 | Injection apparatus for supercritical fluid |
| CN104275766A (en) * | 2013-07-11 | 2015-01-14 | 宁波大学 | Device for trapping and recycling supercritical fluid during mould pressing foaming process |
| CN104275766B (en) * | 2013-07-11 | 2017-02-08 | 宁波大学 | Device for trapping and recycling supercritical fluid during mould pressing foaming process |
| CN112167989A (en) * | 2019-07-02 | 2021-01-05 | B/E航空公司 | Heated fluid feedback control system for a beverage maker |
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