CN102580940A - Uniformly and stably jetted liquid carbon dioxide cleaning spray gun - Google Patents
Uniformly and stably jetted liquid carbon dioxide cleaning spray gun Download PDFInfo
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- CN102580940A CN102580940A CN2012100342495A CN201210034249A CN102580940A CN 102580940 A CN102580940 A CN 102580940A CN 2012100342495 A CN2012100342495 A CN 2012100342495A CN 201210034249 A CN201210034249 A CN 201210034249A CN 102580940 A CN102580940 A CN 102580940A
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Abstract
The invention relates to a uniformly and stably jetted liquid carbon dioxide cleaning spray gun which is used for enabling at least part of liquid carbon dioxide to generate solid-gas phase change and then to be used as a cleaning agent uniformly and stably jetted on an object to be cleaned or uniformly stably mixed with compressed gas to be used as a cleaning agent jetted on the object to be cleaned. Preferably, the spray gun is provided with a liquid carbon dioxide inlet channel, a liquid depressor area, a connecting channel and a jetting channel, wherein the liquid carbon diode inlet channel is connected with the liquid depressor area through a pipeline, the connecting channel is uniformly provided with a plurality of holes along the circumference, the liquid depressor area surrounds the connecting channel and is communicated with the connecting channel through a pore, the connecting channel is connected with the jetting channel through a pipeline and is also provided with a liquid-gas mixing region, and the connecting channel is a compressed gas inlet channel and is connected with the jetting channel through a liquid-gas mixing area pipeline. The uniformly and stably jetted liquid carbon dioxide cleaning spray gun has a skilled design and a simplified structure, can realize liquid carbon dioxide cleaning and stable and uniform jetting, thereby having the advantages of simpleness in operation, low cost and good cleaning effect, and being suitable for massive popularization and application.
Description
Technical field
The present invention relates to the lance technology field, particularly clean and use the lance technology field, be meant that specifically spray gun is used in a kind of liquid carbon dioxide cleaning of uniform and stable injection.
Background technology
In present industrial field of washing, novel dry ice cleaning method causes that more and more the user of all trades and professions pays close attention to.The Dry ice cleaning equipment of offshore company lands Chinese industrial and cleans market.Research and development production Dry ice cleaning equipment is transplanted by domestic manufacturer.Progressively replace conventional methods such as traditional chemistry, water under high pressure, sandblast.
Act on behalf of U.S. reputable brand TomCo the applicant
2In the sale of Dry ice cleaning equipment and the after-sale service process, the discovery every trade knows that all Dry ice cleaning is good, has Costco Wholesale only and can't stand, sees also carbon dioxide dry ice cleaning method process chart shown in Figure 1.
The comparison of Dry ice cleaning and traditional approach:
Table one
Table two
| Cleaning technique | Waste disposal | Surface grinding | Toxicity | The conductibility of electricity | Cleaning performance |
| Dry ice | Do not have | Do not have | Do not have | Do not have | Outstanding |
| Sandblast | Have | Have | No * | Do not have | Well |
| Bead | Have | Have | No * | Do not have | Well |
| Walnut shell | Have | Have | No * | Do not have | Limited |
| Steam | Do not have | Do not have | Do not have | Have | Difference |
| Chemical agent | Have | Do not have | Have | Have | Restriction |
Annotate: the above cleaning way of beating asterisk is represented when being used for poisonous object, can produce secondary pollution or chemically reactive, these material requirements classification when they take place, and also noxious material needs safe handling.
The sharpest edges of dry ice cleaner: Dry ice cleaning is high pressure resistant 3～40,000 volts in cleaning process, and dry ice particles directly distils and is CO2 saturability gas, and is non-conductive; Most pollution covering rate at high temperature is the weakest, can save 3～5 times cleaning performance in many application facet on-line cleaning, the shortcoming of locating outside this and exempting traditional sandblast cleaning, and having can not substituted advantage than conventional clean institute.
Although dry ice cleaning system has plurality of advantages, the fund input of equipment is bought dry ice pelletizer, dry ice cleaner; Keeping is used in the selling at exorbitant prices of dry ice incubator, the loss of transportation dry ice; Application cost is too high, and except large enterprise, medium-sized and small enterprises can't be shared the advantage of dry ice blasting.Still adopt the backward technology of tradition and lack product competitiveness.
The major defect of carbon dioxide dry ice cleaning method is:
1, in cleaning process, needs special-purpose dry ice incubator, store and the transportation dry ice particles.
Key issue is the storage and the transportation of dry ice in actual dry ice production and supply, because dry-ice temperature is lower ,-78 ℃, too big with circumstance of temperature difference, in the conduction heat absorption, volatilization is fast under the normal temperature.Common heat preserving mode DeGrain.External present a kind of special-purpose thermal insulation case that is widely used, China does not also have the similar products supply at present, international universally recognized economic storage standard loss every day 8%～10%, it is too big that dry ice stores consumption, and use cost rises.Perhaps the cost of heat-preserving equipment and cost of transportation are too high, with automobile transportation, supply of material radius within 200 kilometers, from the cost limit scope of application of this washing and cleaning operation.
2, dry ice cleaner is had relatively high expectations to compressed-air actuated because it uses pneumatic original paper.The general enterprise of the content of its impurity and moisture power gas source can't reach.Cleaning machine need add special filtration facility for this reason.
3, dry ice pelletizer is expensive, and import is up to a million, and is homemade 500,000, to the input of general business equipment difficulty bear.Except that large enterprise voluntarily purchase of equipment produce the dry ice, medium-sized and small enterprises lean on and buy dry ice operation cleaning, cost is also very high.
Therefore, need provide a kind of liquid carbon dioxide to clean and use spray gun, adopt this spray gun can realize the liquid carbon dioxide cleaning, spray uniform and stable, thereby simple to operate, with low cost, cleaning performance is good.
Summary of the invention
The objective of the invention is to have overcome above-mentioned shortcoming of the prior art; Provide a kind of liquid carbon dioxide cleaning of uniform and stable injection to use spray gun, the liquid carbon dioxide of this uniform and stable injection cleans ingenious with gun design, simple for structure; Adopt this spray gun can realize that liquid carbon dioxide cleans; Spray uniform and stable, thereby simple to operate, with low cost, cleaning performance is good, is suitable for large-scale promotion application.
To achieve these goals; The liquid carbon dioxide of uniform and stable injection of the present invention cleans uses spray gun; Be characterized in that the liquid carbon dioxide cleaning of described uniform and stable injection is injected in the need cleaning objects as uniform and stable being injected on the need cleaning objects or with uniform and stable the mixing as cleaning agent of Compressed Gas of cleaning agent separately after being used to make liquid carbon dioxide at least partly to produce the solid and gas phase-state change with spray gun.
Preferably; The liquid carbon dioxide of described uniform and stable injection cleans has liquid carbon dioxide intake channel, liquid depressor area, interface channel and injection channel with spray gun; Said liquid carbon dioxide intake channel pipeline connects said liquid depressor area; Said interface channel is evenly distributed with some ducts along circumference, and said liquid depressor area is around said interface channel and through the said interface channel of said hole link, and said interface channel pipeline connects said injection channel.
More preferably; Said liquid depressor area has thick portion, and said thick comprises first end and the second end, and the cross section of said first end is greater than the cross section of said the second end; The contiguous said first end of said liquid carbon dioxide intake channel, the contiguous said duct of said the second end.
Further, said thick cross section is an isosceles trapezoid.
More preferably, said injection channel comprises first terminal and second end, and the cross section of said second end is greater than the cross section of said first end, and said interface channel is connected with the said first terminal pipeline.
Further, said injection channel is the La Faer jet pipe.
Preferably, the number in said duct is 2-6, and the diameter in hole is 0.5mm-1mm.
More preferably; The liquid carbon dioxide of described uniform and stable injection cleans also has control valve with spray gun, and said control valve is installed between said liquid carbon dioxide intake channel and the said liquid depressor area or is installed in the said liquid carbon dioxide intake channel.
More preferably, the liquid carbon dioxide of described uniform and stable injection cleans also has liquid gas mixed zone with spray gun, and said interface channel is the inlet for pressurised gas passage, and said inlet for pressurised gas passage connects said injection channel through said liquid gas mixed zone pipeline.
Further, said liquid gas mixed zone comprises first end and second end, and the cross section of said first end is greater than the cross section of said second end, and the said first end pipeline connects said inlet for pressurised gas passage, and the said second end pipeline connects said injection channel.
Especially more preferably, the cross section of said liquid gas mixed zone is an isosceles trapezoid.
Beneficial effect of the present invention specifically is:
1, the cleaning of the liquid carbon dioxide of uniform and stable injection of the present invention is injected in the need cleaning objects as uniform and stable being injected on the need cleaning objects or with uniform and stable the mixing as cleaning agent of Compressed Gas of cleaning agent separately after being used to make liquid carbon dioxide at least partly to produce the solid and gas phase-state change with spray gun; Design ingenious; Simple for structure; Adopt this spray gun can realize that liquid carbon dioxide cleans; Spray uniform and stable, thereby simple to operate, with low cost, cleaning performance is good, is suitable for large-scale promotion application.
2, the liquid carbon dioxide of uniform and stable injection of the present invention cleans and has liquid carbon dioxide intake channel, liquid depressor area, interface channel and injection channel with spray gun; Said liquid carbon dioxide intake channel pipeline connects said liquid depressor area; Said interface channel is evenly distributed with some ducts along circumference; Said liquid depressor area is around said interface channel and through the said interface channel of said hole link, and said interface channel pipeline connects said injection channel, thus liquid carbon dioxide through the step-down of liquid depressor area make liquid carbon dioxide at least part produce after the solid and gas phase-state change passing hole channel and be injected in and need on the cleaning objects; Design ingenious; Simple for structure, adopt this spray gun can realize that liquid carbon dioxide cleans, and sprays uniform and stable; Thereby it is simple to operate, with low cost, cleaning performance is good, is suitable for large-scale promotion application.
3, the liquid carbon dioxide of uniform and stable injection of the present invention cleans and also has liquid gas mixed zone with spray gun; Said interface channel is the inlet for pressurised gas passage, and said inlet for pressurised gas passage connects said injection channel through said liquid gas mixed zone pipeline, thereby liquid carbon dioxide is injected on the need cleaning objects with uniform and stable mixing of Compressed Gas after the step-down of liquid depressor area makes liquid carbon dioxide at least partly produce the solid and gas phase-state change again; Design ingenious; Simple for structure, adopt this spray gun can realize that liquid carbon dioxide cleans, and sprays uniform and stable; Thereby it is simple to operate, with low cost, cleaning performance is good, is suitable for large-scale promotion application.
The liquid carbon dioxide that adopts the liquid carbon dioxide of uniform and stable injection of the present invention to clean to realize with spray gun mixes the above-mentioned three big defectives of having given up Dry ice cleaning as the cleaning method of cleaning agent separately or with Compressed Gas; For market provides simply, inexpensive cleaning method.And solve the following practical problem run into:
1. scientific and reasonable expensive dry ice pelletizer and production site, the loss of stopping carbon dioxide in the dry ice production process have been given up.(1 ton of dry ice of 2.5 tons～3 tons carbon dioxide production)
2. need not to store the special-purpose thermal insulation case of dry ice, Turnover Box.Stop because of storage, in the transportation, the loss of dry ice (real data of every day 8%).
3. given up expensive dry ice cleaner, need not high-quality source of the gas or power supply power, need not keep in repair, realize that failure-free operation is safe and simple.
4. can substitute the cleaning of Dry ice cleaning, and remedy the dry ice rifle body deficiency that can't operate cleaning in narrow and small occasion greatly in most of field.
5. can carry out the meticulous cleaning of small article, can be to automation, the miniaturization continuous wash provides technical support, realizes high-efficiency and economic, safety and environmental protection, the cleaning of simple operation.
Description of drawings
Fig. 1 is a carbon dioxide dry ice cleaning method process chart.
The specific embodiment that Fig. 2 is to use the liquid carbon dioxide of uniform and stable injection of the present invention to clean with spray gun is that liquid gas mixture spray gun carries out the process chart that liquid carbon dioxide cleans.
Fig. 3 is the cross-sectional schematic of liquid gas mixture spray gun shown in Figure 2.
The specific embodiment
See also shown in Figure 3, the liquid carbon dioxide of uniform and stable injection of the present invention clean with spray gun be used to make liquid carbon dioxide at least part produce after the solid and gas phase-state change separately as cleaning agent uniform and stable be injected in need on the cleaning objects or with Compressed Gas uniform and stable mix to be injected in as cleaning agent need cleaning objects.
The liquid carbon dioxide of uniform and stable injection cleans can have any suitable structure with spray gun; See also shown in Figure 3; In specific embodiment of the present invention; The liquid carbon dioxide of described uniform and stable injection cleans has liquid carbon dioxide intake channel 6, liquid depressor area 1, inlet for pressurised gas passage 5, liquid gas mixed zone 2 and injection channel 3 with spray gun; Said inlet for pressurised gas passage 5 connects said injection channel 3 through said liquid gas mixed zone 2 pipelines; Said inlet for pressurised gas passage 5 is evenly distributed with some ducts 7 along circumference, and said liquid carbon dioxide intake channel 6 pipelines connect said liquid depressor area 1, and said liquid depressor area 1 is communicated with said inlet for pressurised gas passage 5 around said inlet for pressurised gas passage 5 and through said duct 7.The inlet for pressurised gas passage 5 here is equivalent to the interface channel that summary of the invention is mentioned, and when not connecting the Compressed Gas source of the gas, inlet for pressurised gas passage 5 is exactly an interface channel, directly connects injection channel 3.
Said liquid depressor area 1 can have any suitable structure; See also shown in Figure 3ly, in specific embodiment of the present invention, said liquid depressor area 1 has thick (not shown); Said thick comprises first end and the second end; The cross section of said first end is greater than the cross section of said the second end, and said liquid carbon dioxide intake channel 6 is close to said first ends, the contiguous said duct 7 of said the second end.
Said thick cross section can be any suitable shape, sees also shown in Figure 3ly, and in specific embodiment of the present invention, said thick cross section is an isosceles trapezoid.
The number in said duct 7 and the diameter in hole can confirm as required that preferably, the number in said duct 7 is 2-6, and the diameter in hole is 0.5mm-1mm.In specific embodiment of the present invention, the number in said duct 7 is 2,4 or 6, and the diameter in hole is 0.5mm, 0.8mm or 1mm.
Said liquid gas mixed zone 2 can have any suitable structure; See also shown in Figure 3; In specific embodiment of the present invention, said liquid gas mixed zone 2 comprises the first end (not shown) and the second end (not shown), and the cross section of said first end is greater than the cross section of said second end; The said first end pipeline connects said inlet for pressurised gas passage 5, and the said second end pipeline connects said injection channel 3.
The cross section of said liquid gas mixed zone 2 can be any suitable shape, sees also shown in Figure 3ly, and in specific embodiment of the present invention, the cross section of said liquid gas mixed zone 2 is an isosceles trapezoid.
Said injection channel 3 can have any suitable structure; See also shown in Figure 3; In specific embodiment of the present invention; Said injection channel 3 comprises the first terminal (not shown) and the second terminal (not shown), and the cross section of said second end is greater than the cross section of said first end, and said liquid gas mixed zone 2 (specifically being second end) is connected with the said first terminal pipeline.
The cross section of said injection channel 3 can be any suitable shape, sees also shown in Figure 3ly, and in specific embodiment of the present invention, said injection channel 3 is La Faer jet pipes.
Get into flow for the ease of when spraying, regulating liquid carbon dioxide; Preferably; The liquid carbon dioxide of described uniform and stable injection cleans also has the control valve (not shown) with spray gun, and said control valve is installed between said liquid carbon dioxide intake channel 6 and the said liquid depressor area 1 or is installed in the said liquid carbon dioxide intake channel 6.See also shown in Figure 3ly, in specific embodiment of the present invention, said control valve is installed in the control valve installation site 4 between said liquid carbon dioxide intake channel 6 and the said liquid depressor area 1.
During use; The liquid carbon dioxide source is connected with liquid carbon dioxide intake channel 6 pipelines; Liquid carbon dioxide has liquid carbon dioxide in the source; The Compressed Gas source of the gas is connected with inlet for pressurised gas passage 5 pipelines; Have Compressed Gas in the Compressed Gas source of the gas, thereby liquid carbon dioxide makes that through 1 step-down of liquid depressor area 2 uniform and stable mixing again were injected on the need cleaning objects (being the cleaning thing among Fig. 2) through injection channel in liquid gas mixed zone through injection channel 3 uniform and stable injections or with Compressed Gas separately after liquid carbon dioxide at least partly produced the solid and gas phase-state change.
Adopt the present invention can realize that liquid carbon dioxide mixes the cleaning method as cleaning agent separately or with Compressed Gas, its be make liquid carbon dioxide at least part produce after the solid and gas phase-state change separately as cleaning agent uniform and stable be injected in need on the cleaning objects or with Compressed Gas uniform and stable mix as cleaning agent be injected in need cleaning objects on.Detailed process is: thus liquid carbon dioxide after liquid depressor area step-down 1 makes liquid carbon dioxide part produces the solid and gas phase-state change at least independent uniform and stable injection or passing hole channel 7 the Compressed Gas circumference evenly get into Compressed Gas in liquid gas mixed zone 2 uniform and stable mix to be injected in through injection channel again need on the cleaning objects (being the cleaning thing among Fig. 2).
The means that make liquid carbon dioxide at least partly produce the solid and gas phase-state change have a variety of, for example adopt step-down, and the amount of said step-down is confirmed as required; For the easy situation of cleaning of the cleaning method that adopts the present invention to realize; Then the amount of said step-down can be less, cleans relatively situation of difficult for the cleaning method that adopts the present invention to realize, then the amount of said step-down needs suitably to increase; For general common situation; Preferably, thus with liquid carbon dioxide be depressured to 5Bar make liquid carbon dioxide at least part produce the solid and gas phase-state change, can be depressured to 5Bar from 20～60Bar such as the amount of said step-down.
Step-down can adopt the aperture (for example thick structure of aforesaid liquid depressor area 1) of needle-valve to realize, utilizes the aperture of needle-valve to realize that step-down is to utilize the general character (promptly be the means that must adopt) of the gas characteristic of carbon dioxide as cleaning method with the method for obtaining solid carbon dioxide.But when opening needle-valve, the carbon dioxides of a large amount of turbulent flows of meeting association when producing drikold, unrectified turbulent gas can have a strong impact on the continuity of cleaning or cause gas explosion or cause ice stifled at the step-down cavity.
The generation reason that ice is stifled:
1, the moisture in the common compressed air and the combination of dry ice, the water-ice meeting plug nozzle that moment produces causes to spray and ends, and serious meeting produces needle-valve and corresponding air supply pipe and carbon dioxide feed pipe and damages because of low temperature.Otherwise will use expensive inert gas to substitute compressed air, or use and add large-scale auxiliary air heater and extra pipeline, to improve dew point (usually will above 200 degrees centigrade), in the rainy season in East China, effect is also undesirable with air heat.The device that adds can limit be connected (like the robot or the manipulator) of cleaning device and other equipment.
2; The moment that needle-valve is opened; Can produce the dry ice of 30-40% and the high-pressure carbon dioxide steam of 70-60%, carbon dioxide vapor can cause pulse phenomenon, this pulse phenomenon can cause injection discontinuous (time and gas; The time and dry ice), and then cause the inlet of playpipe that the accumulation of dry ice is arranged and cause ice stifled.
Block up the continuity that maximizes and guarantee jet cleaning with the liquid carbon dioxide utilization for solving ice; The present invention inlet for pressurised gas passage 5 (interface channel just) along the circumference uniform Design a plurality of ducts 7; The high-pressure carbon dioxide steam is through the decompression of duct 7 current stabilizations and enter inlet for pressurised gas passage 5; Simultaneously dry ice plays the effect of uniform distribution through the duct 7 of regular distribution, when reaching rectification and dry ice uniform distribution purpose, can effectively reduce equipment size and relevant corollary equipment.
Said liquid carbon dioxide can be carried under any appropriate condition; For example normal temperature high voltage, HTHP or cryogenic high pressure; For general common situation, preferably, said liquid carbon dioxide is to carry the back step-down under 20～60Bar in temperature for-20～0 ℃ of pressure.
The speed of said injection and the flow of said injection are confirmed as required; For the easy situation of cleaning of the cleaning method that adopts the present invention to realize; Then the flow of the speed of said injection and said injection can be less, cleans relatively situation of difficult for the cleaning method that adopts the present invention to realize, then the flow of the speed of said injection and said injection needs suitably to increase; For general common situation; Preferably, the speed of said injection is more than 320 meter per seconds, and the flow of said injection is 0.2～1.0 liter of liquid carbon dioxide of per minute or 0.2～1.0 liter of liquid carbon dioxide of per minute and 4 cubes of Compressed Gas.
Said liquid carbon dioxide source can be a pipeline, and preferably, said liquid carbon dioxide source is the liquid carbon dioxide storage tank, and the flow of said liquid carbon dioxide is 0.2～1kg/min.
Said Compressed Gas source of the gas can be a pipeline, and preferably, said Compressed Gas source of the gas is the Compressed Gas storage tank, and said compressed gas flow is 3～5M
3/ min, the pressure of said Compressed Gas are 0.5～0.7mpa.
Said Compressed Gas can be any proper compression gas, and preferably, said Compressed Gas is compressed air or compressed inert.More preferably, said compressed inert is a compressed nitrogen.
The operation principle that the liquid carbon dioxide of uniform and stable injection of the present invention cleans with spray gun is: according to thermodynamics under uniform temperature and pressure; The phase of carbon dioxide and the process of phase transformation; At the three phase point of a three-phase coexistence, its temperature for-70.06F ° (56.7 ℃) pressure is 75psi (5.1 atmospheric pressure).Liquid depressor area 1 has thick portion; When carbon dioxide gets into thick of liquid depressor area 1 when expanding, generation be the constant-enthalpy process of a perfect condition, pressure is just regional to wait enthalpy (ideal situation) to drop to gas-solid two-phase coexistent; With liquid carbon dioxide as raw material; When its pressure when the thick subordinate who gets into liquid depressor area 1 falls, the degree of carbon dioxide is increased to gas-solid coexistence curve numerical value, remaining carbon dioxide liquid just is transformed into solia particle; Reach the velocity of sound level in the stable back of mixing of recompression even air through your accelerating tube of daraf(reciprocal of farad), act on cleaning objects.
See also shown in Figure 2ly, can use fixation of C O
2The liquid carbon dioxide that wet tank and fixed gas source device are delivered to uniform and stable injection with pipeline cleans with spray gun liquid gas mixture spray gun for example, acts on fixing or removable cleaning thing.Also available removable CO
2Wet tank and removable source of the gas clean fixing or removable thing.Spray required power for cleaning agent, can also can clean and use spray gun from Compressed Gas from the liquid carbon dioxide of uniform and stable injection.During from Compressed Gas, device of the present invention has only three modules at power:
1, Compressed Gas power plant module: as power, its function mainly is to carry to contain the carbon dioxide liquid state by compressed air or nitrogen, and the three-phase mixture of solid-state and gaseous state acts on the dirt of scavenger surface, realizes that energy shifts, and reaches the cleaning purpose.
2, liquid carbon dioxide module: the steel cylinder of storing liquid carbon dioxide or storage tank provide liquid carbon dioxide.
3, liquid carbon dioxide cleans and use spray gun module: make liquid carbon dioxide at least part produce after the solid and gas phase-state change independent uniform and stable jet-action in clean fouling or with Compressed Gas in the liquid carbon dioxide of uniform and stable injection cleans with spray gun after uniform and stable the mixing direct injection act on the cleaning fouling.
Three module is with withstand voltage, and low temperature resistant flexible pipe connects, and conveniently moving is simple to operate.
The operation principle of this system, liquid carbon dioxide is to carry under 20～60Bar in temperature for-20～0 ℃ of pressure, is depressurized to 5Bar at depressor area and produces phase-state change.In the process of carbon dioxide by solid-gas two phases of liquid phase generation molecule, produces-78 ℃ low temperature, force in the violent heat exchange of scavenger surface generation and adhere to fouling products and gather cold contraction; Embrittlement, attachment has the different coefficients of expansion with base material usually, and the temperature difference of moment will be destroyed the non-structure adhesion of unlike material; Its another physical characteristic is; Solid particle is in the moment of phase distillation, and volume will expand more than 800 times, causes countless ' microburst ' fragmentation and peels off dirt at shock point; Use the mechanics effect and the carbon dioxide of high velocity air (1～2 Mach) to undergo phase transition unique calorifics effect, reach the cleaning purpose.
After the liquid carbon dioxide step-down independent uniform and stable injection or mix with Compressed Gas is uniform and stable after the process operation that sprays again be:
1, opens Compressed Gas source of the gas, gas pressure 0.5～0.7mpa; Flow 3～5M
3/ min;
2, open the liquid carbon dioxide liquid-filling valve, the fine setting flow, flow is 0.2～1kg/min;
3, directly clean with independent uniform and stable injection after the spray gun step-down, or in the liquid carbon dioxide of uniform and stable injection cleans with spray gun, spray again in the object of need cleaning after uniform and stable the mixing with Compressed Gas with pipeline delivering liquid carbon dioxide to the liquid carbon dioxide of uniform and stable injection;
4, labour protection: earplug, cover glass, gloves, simple protection gets final product.
Compressed Gas only otherwise quick-fried, does not fire except that compressed air or nitrogen, and nontoxic gas all can be used as power gas source.
In order more to be expressly understood technology contents of the present invention, the special following examples of lifting specify.
Embodiment 1
Unit: light Aluminum (China) Co., Ltd (Japan-funded enterprises) far away
Place: footpath far away, Kunshan City, Jiangsu Province Aluminum Co., Ltd die casting workshop
Cleaning object: on-line cleaning with upper and lower mould aluminum component compression mod releasing agent.
Cleaning condition: under room temperature environment condition (0 ℃, atmospheric pressure), liquid carbon dioxide is that 0 ℃ of pressure is to carry under the 60Bar in temperature; The flow of said liquid carbon dioxide is 0.2kg/min; Compressed-air actuated flow is 3～5M
3/ min, pressure are 0.5～0.7mpa; Liquid carbon dioxide is injected on the cleaning object after after the liquid depressor area of liquid gas mixture spray gun is depressurized to 5Bar, mixing with compressed air is uniform and stable; The speed of spraying is 320 meter per seconds, and the flow of injection is 0.2 liter of liquid carbon dioxide of per minute and 4 cubes of compressed air.
Contrast effect: with sandblast than non-secondary pollution, operating environment is thoroughly improved.
With the dry ice ratio, because the dry ice gun body is long, can't operate cleaning, and cost is high to patrix
Clean configuration: one of 40L liquid carbon dioxide steel cylinder, temperature are-20 degrees centigrade, and high pressure is 20Bar.Former station is furnished with compressed air gas source, and liquid gas mixture spray gun one is (number in duct 7 is 2, and the diameter in hole is 1mm).
Experiment effect: to cold mould, online hot-die is sprayed with the model of releasing agent.Online workman, engineering department is satisfied to cleaning performance.
Conclusion: report the company upper strata, decision-making is adopted.
Embodiment 2
Unit: (Shanghai) Co., Ltd. of saxophone's auto parts and components system
Place: go up sea noise China Chemical Industry Science Co., Ltd (warehouse)
Cleaning object: high ferro train damper surface Fouling Cleaning.
Cleaning condition: under room temperature environment condition (15 ℃, atmospheric pressure), liquid carbon dioxide is to carry under the 40Bar in temperature for-20 ℃ of pressure; The flow of said liquid carbon dioxide is 0.5kg/min; Compressed-air actuated flow is 3～5M
3/ min, pressure are 0.5～0.7mpa; Liquid carbon dioxide is injected on the cleaning object after after the liquid depressor area of liquid gas mixture spray gun is depressurized to 5Bar, mixing with compressed air is uniform and stable; The speed of spraying is 450 meter per seconds, and the flow of injection is 0.5 liter of liquid carbon dioxide of per minute and 4 cubes of compressed air.
Contrast effect: once used giant invalid; The Dry ice cleaning cost is too high not to be adopted, and uses liquid gas mixing ablution, good and cheap.
Clean configuration: one of 40L liquid CO 2 steel cylinder, temperature are-20 degrees centigrade, and high pressure is 20Bar, one of IC engine pneumatics pump, liquid gas mixture spray gun (number in duct 7 is 4, and the diameter in hole is 0.8mm).
Experiment effect: Rapid Cleaning, non-secondary pollution, in turning corner, effect is obvious especially.
Conclusion: consider to adopt
Unit: Shanghai Kai Najie chemical institute
Cleaning object: the dirt of automobile finish/engine nacelle
Cleaning condition: under room temperature environment condition (30 ℃, atmospheric pressure), liquid carbon dioxide is to carry under the 20Bar in temperature for-10 ℃ of pressure; The flow of said liquid carbon dioxide is 1kg/min; Compressed-air actuated flow is 3～5M
3/ min, pressure are 0.5～0.7mpa; Liquid carbon dioxide is injected on the cleaning object after after the liquid depressor area of liquid gas mixture spray gun is depressurized to 5Bar, mixing with compressed air is uniform and stable; The speed of spraying is 400 meter per seconds, and the flow of injection is 1.0 liters of liquid carbon dioxides of per minute and 4 cubes of compressed air.
Wash result: can remove the vehicle body lacquer painting fast, the dirt of hub surface and insect corpse, especially obvious to working of plastics.
To engine nacelle intrinsic motivation surface, power lug, the dirt on surfaces such as dead angle can be removed fast
Realize anhydrous cleaning;
Clean configuration: 1, air pressure is 5 kilograms, 2 cubes of flows, one of air compressor machine.
2,40L liquid carbon dioxide steel cylinder is one, and temperature is-20 degrees centigrade, and high pressure is 20Bar.
3, liquid gas mixture spray gun (number in duct 7 is 6, and the diameter in hole is 0.5mm).
Cleaning object: PCB surface
Cleaning condition: under room temperature environment condition (0 ℃, atmospheric pressure), liquid carbon dioxide is that 0 ℃ of pressure is to carry under the 60Bar in temperature; The flow of said liquid carbon dioxide is 0.2kg/min; Compressed-air actuated flow is 3～5M
3/ min, pressure are 0.5～0.7mpa; Liquid carbon dioxide is direct uniform and stable being injected on the cleaning object after the liquid depressor area of liquid gas mixture spray gun is depressurized to 5Bar, and the speed of injection is 320 meter per seconds, and the flow of injection is 0.2 liter of liquid carbon dioxide of per minute.
Wash result: can remove residues such as surface dirt and rosin
Clean configuration: one of 40L liquid carbon dioxide steel cylinder, liquid gas mixture spray gun (number in duct 7 is 2, and the diameter in hole is 1mm).
Embodiment 5
Cleaning object: PCB surface
Cleaning condition: under room temperature environment condition (15 ℃, atmospheric pressure), liquid carbon dioxide is to carry under the 40Bar in temperature for-20 ℃ of pressure, and said normal temperature is 0 ℃, and said high pressure is 40 kilograms; The flow of said liquid carbon dioxide is 0.5kg/min; Compressed-air actuated flow is 3～5M
3/ min, pressure are 0.5～0.7mpa; Liquid carbon dioxide is direct uniform and stable being injected on the cleaning object after the liquid depressor area of liquid gas mixture spray gun is depressurized to 5Bar, and the speed of injection is 450 meter per seconds, and the flow of injection is 0.5 liter of liquid carbon dioxide of per minute.
Wash result: can remove residues such as surface dirt and rosin
Clean configuration: one of 40L liquid carbon dioxide steel cylinder, liquid gas mixture spray gun (number in duct 7 is 4, and the diameter in hole is 0.8mm).
Embodiment 6
Cleaning object: PCB surface
Cleaning condition: under room temperature environment condition (30 ℃, atmospheric pressure), liquid carbon dioxide is to carry under the 20Bar in temperature for-10 ℃ of pressure; The flow of said liquid carbon dioxide is 1kg/min; Compressed-air actuated flow is 3～5M
3/ min, pressure are 0.5～0.7mpa; Liquid carbon dioxide is direct uniform and stable being injected on the cleaning object after the liquid depressor area of liquid gas mixture spray gun is depressurized to 5Bar, and the speed of injection is 400 meter per seconds, and the flow of injection is 1.0 liters of liquid carbon dioxides of per minute.
Wash result: can remove residues such as surface dirt and rosin
Clean configuration: one of 40L liquid carbon dioxide steel cylinder, liquid gas mixture spray gun (number in duct 7 is 6, and the diameter in hole is 0.5mm).
Therefore, adopt the present invention, can:
1. be medium-sized and small enterprises, reach the professional user cheap and good-quality carbon dioxide cleaning method and device are provided, improve the product competitiveness of these enterprises.
2. use liquid air mixing ablution more convenient more economical, as shown in the table:
3. freedom from repairs simple to operate.
To sum up, liquid carbon dioxide purging system design of the present invention is ingenious, simple for structure, simple to operate, with low cost, cleaning performance is good, is suitable for large-scale promotion application.
In this specification, the present invention is described with reference to its certain embodiments.But, still can make various modifications and conversion obviously and not deviate from the spirit and scope of the present invention.Therefore, specification and accompanying drawing are regarded in an illustrative, rather than a restrictive.
Claims (11)
1. the liquid carbon dioxide of a uniform and stable injection cleans and uses spray gun; It is characterized in that the liquid carbon dioxide cleaning of described uniform and stable injection is injected in the need cleaning objects as uniform and stable being injected on the need cleaning objects or with uniform and stable the mixing as cleaning agent of Compressed Gas of cleaning agent separately after being used to make liquid carbon dioxide at least partly to produce the solid and gas phase-state change with spray gun.
2. the liquid carbon dioxide of uniform and stable injection according to claim 1 cleans and uses spray gun; It is characterized in that; The liquid carbon dioxide of described uniform and stable injection cleans has liquid carbon dioxide intake channel, liquid depressor area, interface channel and injection channel with spray gun; Said liquid carbon dioxide intake channel pipeline connects said liquid depressor area; Said interface channel is evenly distributed with some ducts along circumference, and said liquid depressor area is around said interface channel and through the said interface channel of said hole link, and said interface channel pipeline connects said injection channel.
3. the liquid carbon dioxide of uniform and stable injection according to claim 2 cleans and uses spray gun; It is characterized in that; Said liquid depressor area has thick portion, and said thick comprises first end and the second end, and the cross section of said first end is greater than the cross section of said the second end; The contiguous said first end of said liquid carbon dioxide intake channel, the contiguous said duct of said the second end.
4. the liquid carbon dioxide of uniform and stable injection according to claim 3 cleans and uses spray gun, it is characterized in that said thick cross section is an isosceles trapezoid.
5. the liquid carbon dioxide of uniform and stable injection according to claim 2 cleans and uses spray gun; It is characterized in that; Said injection channel comprises first terminal and second end; The cross section of said second end is greater than the cross section of said first end, and said interface channel is connected with the said first terminal pipeline.
6. the liquid carbon dioxide of uniform and stable injection according to claim 5 cleans and uses spray gun, it is characterized in that said injection channel is the La Faer jet pipe.
7. the liquid carbon dioxide of uniform and stable injection according to claim 1 cleans and uses spray gun, it is characterized in that, the number in said duct is 2-6, and the diameter in hole is 0.5mm-1mm.
8. the liquid carbon dioxide of uniform and stable injection according to claim 2 cleans and uses spray gun; It is characterized in that; The liquid carbon dioxide of described uniform and stable injection cleans also has control valve with spray gun, and said control valve is installed between said liquid carbon dioxide intake channel and the said liquid depressor area or is installed in the said liquid carbon dioxide intake channel.
9. the liquid carbon dioxide of uniform and stable injection according to claim 2 cleans and uses spray gun; It is characterized in that; The liquid carbon dioxide of described uniform and stable injection cleans also has liquid gas mixed zone with spray gun; Said interface channel is the inlet for pressurised gas passage, and said inlet for pressurised gas passage connects said injection channel through said liquid gas mixed zone pipeline.
10. the liquid carbon dioxide of uniform and stable injection according to claim 9 cleans and uses spray gun; It is characterized in that; Said liquid gas mixed zone comprises first end and second end; The cross section of said first end is greater than the cross section of said second end, and the said first end pipeline connects said inlet for pressurised gas passage, and the said second end pipeline connects said injection channel.
11. the liquid carbon dioxide of uniform and stable injection according to claim 10 cleans and uses spray gun, it is characterized in that the cross section of said liquid gas mixed zone is an isosceles trapezoid.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012100342495A CN102580940A (en) | 2012-02-15 | 2012-02-15 | Uniformly and stably jetted liquid carbon dioxide cleaning spray gun |
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| CN2012100342495A CN102580940A (en) | 2012-02-15 | 2012-02-15 | Uniformly and stably jetted liquid carbon dioxide cleaning spray gun |
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| CN102580940A true CN102580940A (en) | 2012-07-18 |
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| CN2012100342495A Pending CN102580940A (en) | 2012-02-15 | 2012-02-15 | Uniformly and stably jetted liquid carbon dioxide cleaning spray gun |
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| CN111360073A (en) * | 2020-02-13 | 2020-07-03 | 中南大学 | Method for improving surface roughness of rolled copper foil |
| CN114668525A (en) * | 2022-03-16 | 2022-06-28 | 深圳市光明区妇幼保健院 | Little explosion impacted style uropoiesis surgical instrument belt cleaning device |
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| CN114668525A (en) * | 2022-03-16 | 2022-06-28 | 深圳市光明区妇幼保健院 | Little explosion impacted style uropoiesis surgical instrument belt cleaning device |
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Application publication date: 20120718 |