CN106111380B - A kind of venturi powder pump intelligent air control method - Google Patents
A kind of venturi powder pump intelligent air control method Download PDFInfo
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- CN106111380B CN106111380B CN201610649105.9A CN201610649105A CN106111380B CN 106111380 B CN106111380 B CN 106111380B CN 201610649105 A CN201610649105 A CN 201610649105A CN 106111380 B CN106111380 B CN 106111380B
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- gas
- powder
- supply
- carrier gas
- gross
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
- B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
Abstract
The invention discloses a kind of venturi powder to pump intelligent air control method, the present invention principle constant using gas gross, when the adjustment of powder output quantity, the proportionate relationship of itself and powder supply gas of inverse proportion adjust automatically, the supply of the carrier gas are allowed operator to be subject to modifications and variations by carrier gas；After the completion of amendment, system will automatically record the offset of setting value in setting numerical value and program, and system forms a new carrier gas according to the offset and biases gradient curve；When using the system again, system is assigned to carrier gas numerical value for the new corresponding numerical value of carrier gas biasing gradient curve for being superimposed amendment offset is read；The preset gradient curve of gas gross, which also synchronizes, simultaneously increases or decreases corresponding amount of bias, forms real gas total amount and carrier gas tolerance, without re-starting adjustment operation, uses convenience more.
Description
Technical field
The present invention relates to the control of venturi powder pump, especially a kind of venturi powder pumps intelligent air control method.
Background technique
General traditional powdered rubber when being delivered to spray gun or other devices is realized using the device of venturi principle,
Venturi establishes the powder that a parital vacuum comes in suction powder container, then that the powder of this fluidisation is soft by one
Pipe is blown to terminal spray gun.For a long time, this Venturi is because its control is simple with low cost and as preferential choosing
The method selected is used for the transmission field of dusty spray, the generally artificial setting of the control method of compressed air.Venturi
Promotion gas and carrier gas pressure and flow be control Venturi conveying spraying substance output quantity size and flow velocity close
Bond parameter.It is to fully rely on the experience of operator in operation to adjust.
The Venturi of the overwhelming majority all includes two kinds of variable compressive air supplies：First variable airflow is supplied to
Venturi nozzle is used, and the size of nozzle air-flow determines the partial vacuum of Venturi and the size of powder conveying capacity, this
A air-flow is commonly referred to as " powder supply gas " or " conveying gas "；Second variable airflow is supplied to the powderject of Venturi defeated
Inside the pipeline of outlet, in order to obtain steady controllable Dual-Phrase Distribution of Gas olid, normally referred to as " carrier gas " or " additional
Gas ".
Usually the supply of the two compressed airs is separately adjustable, sets " powder supply gas " first when spraying to determine powder
Then the size of output quantity sets " carrier gas " according to the powder situation that lance ejection goes out, to guarantee the sky of gun slot injection
Gas and mixture of powders are as steady as possible and do not have " spitting powder " phenomenon.
Although many operators and device manufacturer think：When powder supply gas increases, carrier gas should also increase simultaneously, but
In most cases, actual conditions are just the opposite.
Actually this is because the flow of powder outlet quantity and powder supply gas there is no linear relationships, so when powder supply gas increases,
Powder output quantity will not be increased in same ratio, relatively can be smaller.
This principle is to be conducive to that constant an air-flow and rate of powder is maintained to pass through defeated powder hose and spray gun as a result,
When powder supply air-flow increases, carrier gas should be reduced suitably.This not only ensures a more stably powder stream, also ensure from
Gun slot ejects stable powder atomization shape and spray distance, this concept is referred to as " gas gross " control.
The principle of the control method is that the total amount of venturi powder pump input gas is gas gross, and the gas gross is
The supply of the sum of powder supply gas and the supply of carrier gas, powder supply gas and carrier gas can be independently controlled respectively, according to text
Gas gross is set as a steady state value by the maximum powder output quantity for the setting that powder pumps in mound, and it is total that the supply of powder supply gas accounts for gas
The ratio of amount be powder supply gas ratio, the supply of carrier gas account for gas gross ratio be carrier gas ratio, powder supply gas ratio with
Carrier gas ratio is inversely proportional, and when the adjustment of powder output quantity, the proportionate relationship of the adjustment carrier gas and powder supply gas of inverse proportion is maintained
Gas gross is constant, and can reach required powder output quantity, by the control method, is conducive to maintain a constant air-flow
With rate of powder by defeated powder hose and spray gun, easy to control, when powder supply gas increases, carrier gas should be reduced suitably, this is not
It only ensures a more stably powder stream, also ensures from gun slot and eject stable powder atomization shape and jet length
From.
As shown in fig. 1, the control of the two air of ﹐ is no longer treated as powder supply gas and carrier gas Xia gas gross control,
And become gas gross.The adjustment of powder output quantity depends on the ratio of powder supply gas and carrier gas in gas gross in gas gross
Example, such as maximum powder output quantity are exactly by the maximum value of powder supply controlled atmosphere section to gas gross, while carrier gas automatically adjusts
To the opposite ratio of gas gross.
When required maximum powder output quantity is reduced, as shown in Fig. 2, when actually required maximum powder output quantity is reduced
To Fig. 1 75% when, gas gross is adjusted to 75% of gas gross in Fig. 1, sends out the adjusting powder supply gas of ratio and dilute
The adjusting of powder output quantity can be realized in ratio of the outgassing in gas gross.
Gas gross control can realize with the mechanical structure of the air flow meter interconnected, can also be by by motor
The air flow meter of driving or proportional flow control valve realize this function, configure master control system, are arranged in long-range above hand-operated gun
Control function can be used for adjusting the size of powder outlet quantity, usually only need to be conveniently adjusted a powder output quantity parameter, without adjusting
Save the size of carrier gas.
The concept of gas gross control, is not only for powder supply gas and carrier gas to be automatically adjusted to opposite proportionate relationship, and
Operator can make adjustment to gas gross.Making the conveying of powder can achieve the purpose that steadily to convey.
In gas gross control system, air mass flow is typically shown as " cube m/h ", it is also possible to can use other units
Display or is directly indicated with a percentage such as " liter/second ".
One of gas gross control system is undesirable to be characterized in that obtainable maximum powder supply gas is total equal to maximum gas
The setting value of amount.This means that the output quantity of powder will also adjust simultaneously, i.e., if gas gross is had adjusted by operator
In the case where so that powder output is set in and is not changed.Operator, which may may require that, makes second of adjustment to powder output quantity,
To restore correct powder output valve.
Another undesirable feature of gas gross control system is：Proportionate relationship between powder supply gas and diluent air begins
Be eventually it is fixed, operator can not adjust proportionate relationship between the two.If the practical situation of air-powder stream is not suitable for thing
The proportionate relationship first set, the difficulty of best powder volume and flow is arranged increasing for this.Such as：The specific gravity and partial size of powder
Diluent air amount or different powder delivery hose length or powder path sometimes for different proportion is different, it is also desirable to
Different dilution tolerance.
Another unwelcome feature of gas gross control system is：Many operators, especially those have been
Habit individually adjusts the operator of powder supply gas and carrier gas, the principle of gas gross control be it is not intelligible, this will will affect
Gas gross control system it is proper use of.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention provides a kind of venturi powder pump intelligent air control method.
The technical solution adopted by the present invention to solve the technical problems is：
The total amount of a kind of venturi powder pump intelligent air control method, venturi powder pump input gas is gas gross, described
Gas gross is the sum of powder supply gas and the supply of carrier gas, and the supply of powder supply gas and carrier gas can be controlled individually respectively
Gas gross is set as a steady state value according to the powder output quantity that venturi powder pumps by system, and it is total that the supply of powder supply gas accounts for gas
The ratio of amount be powder supply gas ratio, the supply of carrier gas account for gas gross ratio be carrier gas ratio, powder supply gas ratio with
Carrier gas ratio is inversely proportional.
The supply of carrier gas has an offset, and the supply and offset adjusted amount of carrier gas are practical carrier gas gas
Amount adjusts the supply of powder supply gas according to practical carrier gas tolerance.
The supply of powder supply gas and carrier gas cooperates gas control valve to control by digital programmable electric-control system.
The supply of powder supply gas and carrier gas cooperates gas control valve to control by simulation electric-control system.
The supply of powder supply gas and carrier gas cooperates gas control valve to control by mechanical device.
The beneficial effects of the invention are as follows：Using the principle that gas gross is constant in the present invention, when the adjustment of powder output quantity,
The proportionate relationship of itself and powder supply gas of inverse proportion adjust automatically, the supply of the carrier gas are allowed operator to be corrected by carrier gas
And change；After the completion of amendment, system will automatically record the offset of setting value in setting numerical value and program, and system is according to the offset
Amount forms a new carrier gas and biases gradient curve；When using the system again, reading has been superimposed amendment offset by system
The new corresponding numerical value of carrier gas biasing gradient curve of amount is assigned to carrier gas numerical value；The preset gradient curve of gas gross simultaneously
Also it synchronizes and increases or decreases corresponding amount of bias, form real gas total amount and carrier gas tolerance, without re-starting adjustment behaviour
Make, uses convenience more.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the linear schematic diagram of control of gas gross of the present invention；
The linear schematic diagram of control when Fig. 2 is 75% that real gas total amount of the present invention is Fig. 1 gas gross；
Fig. 3 is the linear schematic diagram of control when carrier gas offset is added in the present invention.
Specific embodiment
To solve the problem above-mentioned, the present invention also provides a control methods, referring to Fig. 3, a kind of venturi powder pump Intelligent air
Pneumatic control method, referred to as intelligent air control method, it is dilute when the adjustment of powder output quantity using the principle that gas gross is constant
Outgassing by the proportionate relationship of itself and powder supply gas of inverse proportion adjust automatically, the supply of the carrier gas allow operator correct with
Change；After the completion of amendment, system will automatically record the offset of setting value in setting numerical value and program, and system is according to the offset
Form a new carrier gas biasing gradient curve；When using the system again, reading has been superimposed amendment offset by system
The corresponding numerical value of new carrier gas biasing gradient curve be assigned to carrier gas numerical value；The preset gradient curve of gas gross simultaneously
It synchronizes and increases or decreases corresponding amount of bias, form real gas total amount and carrier gas tolerance, without re-starting adjustment operation,
Use convenience more.
As shown in Figure 3, carrier gas offset will form new carrier gas linear gradient, then according to new carrier gas line
Property gradient adjustment powder supply gas practical tolerance, to reach required powder output quantity.As shown in Figure 3, when setting amount of powder
When being 75%, Systematic selection and display carrier gas value are 25%, operator according to powder delivery hose and spray gun actual conditions,
It is 45% that new carrier gas, which is arranged, forms new+20% carrier gas biasing gradient curve a, then biases gradient according to carrier gas
Curve a adjusts new carrier gas tolerance, and when such as powder supply gas tolerance being 60%, new carrier gas tolerance should be 40%+20%, real
Border gas gross be set gas gross 120%, while be also maintained at setting gas gross 120%, to powder supply gas with it is dilute
The inverse proportion of outgassing adjusts, i.e. setting gas gross=powder supply gas+carrier gas, real gas total amount=powder supply gas+carrier gas+dilute
Outgassing offset, here, related percentage are the percentage of the gas gross relative to setting.
Intelligent air control method maintain original simple single control adjust powder output quantity and carrier gas from
Dynamic adjustment.But it brings greater flexibility to operator, because operator can essence in the case where not influencing powder output quantity
Diluent air amount needed for fine control, and the parameter of these optimizing regulations can be automatically applied to then used in powder it is defeated
Output.
The control method of this adjustment is simply, to be easy to be understood by operator.Because powder output quantity is shown 0~
100% usable range, rather than the setting value of 0~100% gas gross, and carrier gas control is similarly displayed as
0~100% usable range.
When powder output quantity changes, intelligent air control system also maintains a given air velocity and powder
Later and decadent stage of a school of thought speed is come through powder delivery hose and spray gun.
One advantage of intelligent air control method is：Carrier gas offset can be used for down compensating difference to a certain degree
The powder delivery hose of diameter, to reach required air mass flow and rate of powder.
In current concrete application, carrier gas offset be may be adjusted to relative to typical set value maximum ± 40%
Range, naturally it is also possible to be set in other ranges.
Carrier gas offset can automatically reset to zero with a reset button or be executed using reset routine, can also
Powder supply gas and carrier gas two values are set all for 50%, because their moving law is inverse proportion with hand-reset.
In this example concrete application, the supply of powder supply gas and carrier gas can be matched by digital programmable electric-control system
Gas control valve is closed to control；Gas control valve can also be cooperated to control by simulation electric-control system；Machinery can also be passed through
Device such as knob, gear etc. cooperates gas control valve to control.In a particular application, the regulating valve of powder supply gas and carrier gas can be by
The needle-valve of motor driving controls, but can also be controlled by automatically controlled proportional flow control valve.
Preferable implementation of the invention is illustrated above, certainly, the present invention can also use and above-mentioned implementation
The different form of mode, those skilled in the art's made equivalent transformation on the premise of without prejudice to spirit of the invention
Or corresponding change, all it should belong in protection scope of the present invention.
Claims (4)
1. a kind of venturi powder pumps intelligent air control method, it is characterised in that：The powder supply gas of the venturi powder pump of original state
It is the setting value of a system intialization with the sum of the supply of carrier gas gas gross；Automatically two are used when system initial state
The supply that two-way air-flow is controlled against ratio gradient curve, so that gas gross maintains a steady state value；When first used, when
When powder supply gas supply is changed, carrier gas supply transfers carrier gas in corresponding inverse ratio gradient curve preset inside program
The value of supply；The supply of the carrier gas allows operator to be subject to modifications and variations；After the completion of amendment, system will be automatically recorded
The offset of setting value in numerical value and program is set, system forms a new carrier gas according to the offset and biases gradient curve；
When using the system again, it is corresponding that system will read the new carrier gas biasing gradient curve that has been superimposed amendment offset
Numerical value is assigned to carrier gas numerical value；The preset gradient curve of gas gross, which also synchronizes, simultaneously increases or decreases corresponding amount of bias.
2. a kind of venturi powder according to claim 1 pumps intelligent air control method, it is characterised in that：Powder supply gas and dilute
The supply of outgassing cooperates gas control valve to control by digital programmable electric-control system.
3. a kind of venturi powder according to claim 1 pumps intelligent air control method, it is characterised in that：Powder supply gas and dilute
The supply of outgassing cooperates gas control valve to control by simulation electric-control system.
4. a kind of venturi powder according to claim 1 pumps intelligent air control method, it is characterised in that：Powder supply gas and dilute
The supply of outgassing cooperates gas control valve to control by mechanical device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610649105.9A CN106111380B (en) | 2016-08-09 | 2016-08-09 | A kind of venturi powder pump intelligent air control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610649105.9A CN106111380B (en) | 2016-08-09 | 2016-08-09 | A kind of venturi powder pump intelligent air control method |
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| Publication Number | Publication Date |
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| CN106111380A CN106111380A (en) | 2016-11-16 |
| CN106111380B true CN106111380B (en) | 2018-11-16 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103562A (en) * | 1986-04-18 | 1987-12-23 | 流体技术(澳大利亚)有限公司 | Fluid injection system |
| US5013499A (en) * | 1988-10-11 | 1991-05-07 | Sudamet, Ltd. | Method of flame spraying refractory material |
| CN1190911A (en) * | 1995-07-21 | 1998-08-19 | 美国3M公司 | Spraying system for single or multiple fluids |
| GB2329135B (en) * | 1997-08-26 | 1999-08-18 | Korea Atomic Energy Res | Apparatus for dispensing powder |
| CN102713310A (en) * | 2009-11-24 | 2012-10-03 | J.施迈茨有限公司 | Compressed-air-operated vacuum generator or vacuum gripper |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8245958B2 (en) * | 2010-01-04 | 2012-08-21 | Chuan-Wei Ko | Powder sprayer |
-
2016
- 2016-08-09 CN CN201610649105.9A patent/CN106111380B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87103562A (en) * | 1986-04-18 | 1987-12-23 | 流体技术(澳大利亚)有限公司 | Fluid injection system |
| US5013499A (en) * | 1988-10-11 | 1991-05-07 | Sudamet, Ltd. | Method of flame spraying refractory material |
| CN1190911A (en) * | 1995-07-21 | 1998-08-19 | 美国3M公司 | Spraying system for single or multiple fluids |
| GB2329135B (en) * | 1997-08-26 | 1999-08-18 | Korea Atomic Energy Res | Apparatus for dispensing powder |
| CN102713310A (en) * | 2009-11-24 | 2012-10-03 | J.施迈茨有限公司 | Compressed-air-operated vacuum generator or vacuum gripper |
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| Publication number | Publication date |
|---|---|
| CN106111380A (en) | 2016-11-16 |
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