CN1073878C - Autocontrolled gas mixing pump - Google Patents
Autocontrolled gas mixing pump Download PDFInfo
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- CN1073878C CN1073878C CN99114490A CN99114490A CN1073878C CN 1073878 C CN1073878 C CN 1073878C CN 99114490 A CN99114490 A CN 99114490A CN 99114490 A CN99114490 A CN 99114490A CN 1073878 C CN1073878 C CN 1073878C
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Abstract
The present invention relates to an automatically controlled gas mixing pump which adopts a gas distribution re-feedback device. Previously mixed gas with the concentration of 100 ppm enters a gas storage chamber, and the mixed gas with the concentration of 100 ppm and mixed base gas such as air or nitrogen under a certain pressure are fed back to a gas inlet of a mixing pump 2 by a valve 1. The concentration of output gas which is mixed again can reach 1 ppm to 100 ppm, and the output gas is input into a gas using device by a channel 1 in a valve 2. The proportion of each component of the mixed gas is regulated by a regulator automatically controlled by a computer.
Description
The present invention relates to a kind of gas mixing pump of preparing gas, particularly a kind of by computer-controlled automatic gas mixing pump system.
In the research process of all kinds of gas sensors, need to prepare the performance test that various gases are used for gas sensor, to determine and to estimate the performance of gas sensor.For example measure the selectivity of a certain model gas sensor, to the sensitivity of tested gas and long term operation stability etc. to gas with various.The preparation test gas can adopt static and dynamic two kinds of methods, and the former simple and fast is applicable to the static test of gas sensor; The latter is applicable to the dynamic test of gas sensor, but needs special equipment.But, the dynamic air-distributing test is absolutely necessary in the research and development of gas sensor, particularly has certain advantage aspect the Performance Evaluation of sensor.
The gas mixing pump has many purposes, and not only aspect the test and demarcation of gas sensor, in biological meteorological experiment, aspects such as industrial and agricultural production all need the mist of different purposes.This kind equipment of present domestic introduction mainly is the mechanical type manual regulating system, as Beijing labour protection research institute and Jilin University etc.They need the on-the-spot supervision of people and could move, and can not realize automatic distributing.
China uses at present generally is from the model of the West Germany's import gas mixing pump as 2M300/a-F, this gas mixing pump can enter two kinds of gases simultaneously to be mixed, its preparation gas concentration scope is 1%-100%, with 1% is that progress increases or reduces, its minimum distribution concentration is 1%, with two pumps its minimum distribution concentration of contacting is 1/10000 (being 100ppm), and can prepare the mist of three components.Along with research work deeply and the needs of others, the test and the demarcation of gas sensor proposed increasing requirement, expose many defectives of this gas mixing pump.As the examination of the automatic test of the automatic test of long-term continuous many concentration point under the situation of unsupervised, sensor performance and demarcation, sensor long-time stability and dynamic test etc., because this gas mixing pump is mechanical manual adjustments, can not automatic distributing, brought great inconvenience to test.Research work needs the gas mixing pump can realize the automatic preparation of many concentration gases automatically under computer control.At present two gas mixing pumps are coupled together in addition and use minimum distribution concentration can only reach 100ppm yet, can not satisfy the needs of scientific research and exploitation, minimum distribution concentration does not reach 1ppm.
One of purpose of the present invention will provide a kind of gas mixing pump and work system of automatic control distribution exactly, by manual adjustments to programme controlled automatic adjusting, as long as parameters such as the gas componant that will prepare, concentration and time are imported computer in advance, under computer program control, just can realize whole distribution process automatically.Two of purpose of the present invention is to make minimum distribution concentration reach 1ppm.
Technical scheme of the present invention is: a kind of automatic control gas mixing pump system, it is characterized in that adopting two gas mixing pump series connection and distribution feedback device, pump (4) and pump (5) series operation, adjusting through gas mixing pump automatic control and adjustment device a1b1a2b2 and a3b3a4b4, wherein the passage K of valve (1) opens G and closes, the passage K of valve (2) closes G and opens, and mixed gas concentration is that 100ppm enters expansion box (7);
The mist that with concentration is 100ppm is again feeding back to pump (5) air inlet and is mixing spirit such as air or nitrogen and mix in pump (5) through valve (1) under the constant pressure, the passage G of valve this moment (2) closes K and opens, the concentration of mixing back output gas once more can reach 1ppm-100ppm, and passage K is transported to air container (6) or other gas equipment in valve (2).
Described distribution feedback device comprises expansion box (7), valve (1), valve (2), valve (3), compression steel cylinder (9), gas pressure Detection ﹠ Controling device (8);
Expansion box (7) is the positive square container made from metal material, and a built-in rubbery air pocket (10) is used for gas storage; There are three holes to be used for above the expansion box (7) with triple valve valve (1), valve (2), valve (3) and gas pressure Detection ﹠ Controling device (8) are communicated with automatically, and join expansion box (7) sealing and by autocontrol valve (3) and compression steel cylinder (9) by Pneumatic controller (8) control inner pressure constant.
Described gas mixing pump automatic control and adjustment device is the device that is used for automatically being provided with the adjustments of gas mixed proportion, and it comprises computer, automatic switch, stepper motor, motor and switch driving circuit, knob position detecting sensor and circuit thereof and the output circuit of encoding.
Automatic control and adjustment device core texture is made up of three disks, the front of this adjuster is stepper motor (11), the back is mixing pump gas distribution piston (16), therefrom connect with rotating shaft (12), outermost disk (13) is that a rotary turnplate is made by metal material, it is relative with loophole (18) on the center fixed disk (14) that a light emitting diode (17) is installed on the rotary turnplate, and this rotary turnplate (13) is with by center and motor-driven rotatable shaft (12) rotation that is fixed thereon; The middle disk (14) and the disk (15) of back are fixed disk, and be fixing by fixed screw holes (19);
Middle disk (14) has corresponding to the loophole (18) of regulating distribution concentration knob a1b1a2b2 position, and promptly 0-10 has 11 apertures, and each loophole (18) has a corresponding codes in circuit; Light emitting diode (17) issued light sees through loophole (18) and makes that the back disk is that photo-detector diode (20) on the circuit board (15) detects and encoded by coding circuit, in order to determine the adjustment state of automatic control and adjustment device a1b1a2b2.
The method of a kind of automatic control gas mixing pump system, with programmed instruction control appliance operation journey, it is characterized in that described distribution feedback device and other system switching such as power supply all are computer program instructions automatic control and adjustment and open and close, system is operation automatically under computer program instructions:
(a) start computer, the UCDOS with on the mouse double-click display screen enters gas and mixes
Close pump automatic distributing control system main menu, start the mixing pump power supply simultaneously also
Begin to reset, be returned to original state;
(b) under original state, various promptings appear, according to the prompting keyboard on the interface
On the S key, enter S parameter setup menu, select with up and down arrow keys,
Various parameters can be set;
(c) single-point concentration preparation expression institute distribution bulk concentration value does not change, if distribution concentration
Less than 100ppm, except input distribution concentration, also to import airbag and fill
Gas time and airbag deflation time;
(d) a plurality of gas concentrations are prepared in multiple spot concentration preparation expression continuously, on menu
Parameter request is imported compound concentration, distribution time and the time interval respectively;
(e) the inquiry setting value can check whether input value is correct, and system should show
Concentration is joined by numeral of showing such as running time and present institute;
(f) press esc key, press the T key again, enter the distribution menu, mobile up and down arrow keys
Select, press "enter" key" again, just can begin the gas preparation;
(g) after screen display was finished, system was out of service automatically, or showed according to prompting: R
Show and continue preparation, Q represents to log off and reset.Below in conjunction with accompanying drawing and specific implementation method the present invention is done explanation in further detail:
Fig. 1 is the air distribution system structured flowchart of automatic control gas mixing pump of the present invention.Fig. 2 is the structure chart of expansion box in the structured flowchart shown in Figure 1.Fig. 3 is the structural analysis schematic diagram of automatic control and adjustment device in the structured flowchart shown in Figure 1.Fig. 4 is the computer automatic control system block diagram.Fig. 5 controls gas mixing pump systems soft ware to implement block diagram automatically.Fig. 6 is the schematic perspective view of gas mixing pump.
Fig. 1 is the air distribution system structured flowchart of automatic control gas mixing pump of the present invention system.
Fig. 1 (a) is the critical piece structure chart, and Fig. 1 (b) is connected mode and the airflow direction block diagram between corresponding each parts.As shown in Figure 1, A is that diluent gas (or carrier gas) is as nitrogen, B is that diluted gas (or preparation gas) is as oxygen, mixing pump 4 and mixing pump 5 are the mixed pump of gas, every minimum distribution concentration of mixing pump is 1%, two mixing pumps series connection distribution lower limit can reach ten thousand/and be 100ppm, three series connection distribution lower limits can reach 1,000,000/and be 1ppm.For this reason, the air inlet that feeds back to pump 5 after the gas output of pump 4 and pump 5 series connection preparations more further dilutes, and can realize the effect of three series connection of pumps distributions.
The distribution consistencyregulator of gas mixing pump is b2a2b1a1, and they are equivalent to the b2a2b1a1 of pump 4 among Fig. 4 or the b4a4b3a3 of pump 5 respectively, and detailed structure will illustrate in Fig. 3.Wherein two adjusters of b2a2 are that carrier gas is (as N
2) consistencyregulator, as being set at 9, adjuster a2 sets ten as being set at 70, like this N by an adjuster b2 setting position
2Concentration just be 79% in mist; Two adjusters of b1a1 are (as O by preparation gas
2) consistencyregulator, setting a position by adjuster b1 and for example be set at 1, adjuster a1 sets ten and for example is set at 20, like this O
2Concentration just be 21% in mist.Need to prove that it is 100% that the concentration addition of two kinds of mists requires, otherwise error is bigger.
In the preparation gas concentration when being lower than the mist of 100ppm, pump 4 and pump 5 series operations during beginning, wherein the K of valve 1 opens G and closes, the K of valve 2 closes G and opens, the K of valve 3 closes G and opens, and mixed gas concentration of this stage can reach ten thousand/and be 100ppm, and enter the gas-storing bag 10 in the expansion box 7.
Above-mentioned series operation t
1After time, have enough gas in the gas-storing bag 10, can further prepare the mist of the following concentration of 100ppm.The K in the valve 1 closed G and opened this moment; K in the valve 2 leaves G and closes; K in the valve 3 leaves G and closes, and inflation in expansion box 7 so that the mist in the gas-storing bag 10 feeds back to mixing pump 4 air inlets through valve 1 in the expansion box under constant pressure, mixes with carrier gas once more.Be t running time
2
At t
2In the stage, feedback gas is mixed once more through mixing pump 5 and is exported valve 2 to, and the G in this moment valve 2 closes K and opens, and the output gas concentration can reach 1ppm, and the K passage in valve 2 is transported to gas equipment or caisson 6.Because each components in proportions is relevant with admission pressure in the mist, so at t
2The exhaust of stage gas-storing bag 10 must be controlled, and uses the pressure in a cover gas pressure Detection ﹠ Controling device 8 control expansion boxes 7 here, so that the gas in the airbag is discharged under constant compression force in the expansion box
Fig. 2 is the structure chart of expansion box in the structured flowchart shown in Figure 1.(volume is 1m to the built-in airbag 10 of expansion box
3), be connected with valve 2 with valve 1 shown in Figure 1.Expansion box 7 sealed air-tights are connected with compression steel cylinder 9 by autocontrol valve 5 (being the valve 3 among Fig. 1 b).The t that needs exhaust at gas-storing bag
2Stage, open autocontrol valve 3, in expansion box 7, inflate, and make the pressure in the expansion box keep constant, thereby the gas in the airbag is discharged under constant pressure through a gas pressure Detection ﹠ Controling device 8.Work as t
2Stage, control valve 3 was closed automatically when finishing; At t
1Stage airbag inflation, expansion box passes through the G passage automatic vent of valve 3 again.After finishing a distribution process, under computer controlled automatic, close all air intake valves, close air distribution system.
Fig. 3 is the structural analysis schematic diagram of automatic control and adjustment device in the structured flowchart shown in Figure 1.The automatic control and adjustment device is the device that is used for automatically being provided with the adjustments of gas mixed proportion, and its prototype structure is the manual marching type adjusting knob b2a2b1a1 shown in Fig. 6, and the present invention changes into the automatic control and adjustment device with these manual adjustments knobs.Each automatic control and adjustment device comprises stepper motor 11, motor-drive circuit, knob position detecting sensor and circuit and coding output circuit etc.
Fig. 3 a is the structural relation figure of automatic control and adjustment device core, drive rotating shaft 12 rotations by stepper motor 11, and the rotating disk 13 that drive is fixed thereon rotates, rotating shaft 12 is passed disk 14 and is connected with the mixed gas concentration regulating piston 16 of fixing circuit board 15 with gas mixing pump inside, and drive the flow of its action, thereby reach the purpose of control gas mixture ratio example with control gas.A light emitting diode 17 (Fig. 3 b) is installed on the rotary turnplate 13, it be fixed in gas mixing pump 4 on fixed disc 14 (Fig. 3 c) on loophole 18 (having 11 loopholes) relative.The screw hole that is used for fixing is 19 (totally four).Loophole 18 on the fixed disc 14 is regulated the step-by-step movement knob position corresponding to mixed gas concentration shown in Figure 6, has corresponding 11 loopholes, and awards 11 codings of 0-10 in circuit.
That be right after fixed disc 14 back is fixed disc 15 (Fig. 3 d), there is a photo-detector diode 20 (totally 11) to be fixed thereon corresponding to each loophole, face loophole to detect the light that light emitting diode 17 is sent, 11 photo-detector diode are encoded with 0-10 respectively, with the position of determining that light emitting diode 17 is rotated to.
During work, computer sends instruction and gives the coding drive circuit, and the coding drive circuit drives stepper motor 11 work, makes rotating shaft 12 drive rotating disk 13 and rotates, and drive 16 work of mixing pump gas distribution piston, is provided with and regulates ratio of gas mixture.During rotating disk 13 rotations, light emitting diode 17 and then rotates to corresponding position, and the light that is sent is detected by photo-detector diode 20 by loophole 18.Detect coding circuit and just know the position of automatic control and adjustment arrival that device is regulated,, judge whether it is correct,, then can begin to prepare gas if all correct by comparing with setting value; If still arrive the position of setting, then basis situation at that time continues to regulate, till being adjusted to correct position.
Fig. 4 is the computer automatic control system block diagram.There is shown the relation of various piece under computer control, whole system is how by computer-controlled.
After having imported the ratio of needs preparation gas to computer according to the prompting of computer, computer reaches the program of finishing in advance according to formula, calculate every gas mixing pump should prepare the ratio of gas and the position and the coding thereof at each automatic control and adjustment device place, by the I/O interface make the coding output driving circuit drive stepper motor drive adjusting knob be turning cylinder turn to should the position.At this moment, be the position that knob should arrive along with motor-driven rotating shaft rotation makes the light emitting diode arrival position on the rotary turnplate.
Judge the automatic control and adjustment device whether arrived should the position, monitor by detecting coding output circuit and electro-optical pickoff, the signal acquisition testing circuit feeds back to computer with testing result, computer is judged, should be as also no show institute in the position, then computer continues the operation of control motor by preceding method.When motor moved, testing circuit detected the position of adjuster, and encoded device exports data acquisition card to and feed back in the computer again, till adjusting knob is adjusted to the operating position.This moment, motor was out of service, opened gas mixing pump power supply, electric three passes valve simultaneously under computer control automatically, and determined and regulate the passage of each valve.All are ready, begin to carry out gas and mix, and system closed automatically when gas mixed end.
Fig. 5 controls gas mixing pump systems soft ware to implement block diagram automatically.Operation, the operating process of system, the implementation procedure and the embodiment of software have been the Figure further illustrates.
Fig. 6 is the schematic perspective view of gas mixing pump.There is shown the ratio of gas mixture adjusting knob b2a2b1a1 of pump 4 on the control panel or the b4a4b3a3 of pump 5, they correspond respectively to the parts b2a2b1a1 among Fig. 1 of the present invention, wherein b2a2 controls a kind of ratio of mist, and b1a1 controls the ratio of another kind of mist; The digitized representation of b2 and b1 is a position of gas mixture ratio example separately, and the digitized representation of a2 and a1 is ten of gas mixture ratio example separately.
As shown in FIG., the mixed proportion of nitrogen can be 29%, and the mixed proportion of oxygen can be 71%.Because adjusting knob is step-type, the minimum gas mixture ratio example of a gas mixing pump is 1%, is up to 99%, is the step-length increase and decrease with 1%.It can also be seen that a gas mixing pump can make two kinds of gases mix, two gas mixing pumps are together in series to use three kinds of gases are mixed, and three gas mixing pumps are together in series to use four kinds of gases are mixed, by that analogy.
The present invention changes over the automatic control and adjustment knob with the manual adjustments knob described in Fig. 6, realizes the full-automation of system simultaneously.
The invention has the beneficial effects as follows:
1. realized the 2M300/a-F gas mixing pump by manual adjustments to automatically regulating. Start
After, be issued to the automation that gas with various concentration is prepared in computer program control,
Both can be used for the preparation of single-point concentration, again can continuous many concentration point preparations.
2. the minimum distribution concentration of original separate unit mixing pump is that 1%, two mixing pump series connection is minimum
Distribution concentration is 1/10000, and through after the present invention, minimum preparation gas concentration reaches
Arrived 1ppm.
3. gas storage feedback device of the present invention is equivalent to increase a gas mixing pump,
Not only so that the gas mixture ratio example can be lower, it is mixed to increase a kind of gas simultaneously
The synthetic branch, every through once feeding back, just can increase a kind of gas blending constituent.
Claims (4)
1. control gas mixing pump system automatically for one kind, it is characterized in that adopting two gas mixing pump series connection and distribution feedback device, pump (4) and pump (5) series operation, adjusting through gas mixing pump automatic control and adjustment device a1b1a2b2 and a3b3a4b4, wherein the passage K of valve (1) opens G and closes, the passage K of valve (2) closes G and opens, and mixed gas concentration is that 100ppm enters expansion box (7);
The mist that with concentration is 100ppm is again feeding back to pump (5) air inlet and is mixing spirit such as air or nitrogen and mix in pump (5) through valve (1) under the constant pressure, the passage G of valve this moment (2) closes K and opens, the concentration of mixing back output gas once more can reach 1ppm-100ppm, and passage K is transported to air container (6) or other gas equipment in valve (2).
2. automatic control gas mixing pump according to claim 1 system, it is characterized in that: described distribution feedback device comprises expansion box (7), valve (1), valve (2), valve (3), compression steel cylinder (9), gas pressure Detection ﹠ Controling device (8);
Expansion box (7) is the positive square container made from metal material, and a built-in rubbery air pocket (10) is used for gas storage; There are three holes to be used for above the expansion box (7) with triple valve valve (1), valve (2), valve (3) and gas pressure Detection ﹠ Controling device (8) are communicated with automatically, and join expansion box (7) sealing and by autocontrol valve (3) and compression steel cylinder (9) by Pneumatic controller (8) control inner pressure constant.
3. automatic control gas mixing pump according to claim 1 system, it is characterized in that: described gas mixing pump automatic control and adjustment device is the device that is used for automatically being provided with the adjustments of gas mixed proportion, and it comprises computer, automatic switch, stepper motor, motor and switch driving circuit, knob position detecting sensor and circuit thereof and the output circuit of encoding;
Automatic control and adjustment device core texture is made up of three disks, the front of this adjuster is stepper motor (11), the back is mixing pump gas distribution piston (16), therefrom connect with rotating shaft (12), outermost disk (13) is that a rotary turnplate is made by metal material, it is relative with loophole (18) on the center fixed disk (14) that a light emitting diode (17) is installed on the rotary turnplate, and this rotary turnplate (13) is with by center and motor-driven rotatable shaft (12) rotation that is fixed thereon; The middle disk (14) and the disk (15) of back are fixed disk, and be fixing by fixed screw holes (19);
Middle disk (14) has corresponding to the loophole (18) of regulating distribution concentration knob a1b1a2b2 position, and promptly 0-10 has 11 apertures, and each loophole (18) has a corresponding codes in circuit; Light emitting diode (17) issued light sees through loophole (18) and makes that the back disk is that photo-detector diode (20) on the circuit board (15) detects and encoded by coding circuit, in order to determine the adjustment state of automatic control and adjustment device a1b1a2b2.
4. automatic method of control gas mixing pump system, with programmed instruction control appliance operation journey, it is characterized in that described distribution feedback device and other system switching such as power supply all are computer program instructions automatic control and adjustment and open and close, system is operation automatically under computer program instructions:
(a). start computer, double-click UCDOS on the display screen, enter gas mixing pump automatic distributing control system main menu, start the mixing pump power supply simultaneously and begin to reset, be returned to original state with mouse;
(b.) under original state, various promptings appear on the interface, according to prompting,, enter S parameter setup menu with the S key on the keyboard, select with up and down arrow keys, various parameters can be set;
(c). single-point concentration preparation expression institute distribution bulk concentration value does not change, if distribution concentration less than 100ppm, except input distribution concentration, also will be imported airbag inflationtime and airbag deflation time;
(d). multiple spot concentration preparation expression is a plurality of gas concentrations of preparation continuously, import compound concentration, distribution time and the time interval respectively according to parameter request on the menu;
(e). inquiry setting value can check whether input value correct, and system's numeral that should show such as running time and at present institute join concentration;
(f). press esc key, press the T key again, enter the distribution menu, mobile up and down arrow keys is selected, and presses "enter" key" again, just can begin the gas preparation;
(g). after screen display was finished, system was out of service automatically, or represented to continue preparation according to prompting: R, and Q represents to log off and reset.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99114490A CN1073878C (en) | 1999-10-15 | 1999-10-15 | Autocontrolled gas mixing pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99114490A CN1073878C (en) | 1999-10-15 | 1999-10-15 | Autocontrolled gas mixing pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1255402A CN1255402A (en) | 2000-06-07 |
| CN1073878C true CN1073878C (en) | 2001-10-31 |
Family
ID=5277569
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99114490A Expired - Fee Related CN1073878C (en) | 1999-10-15 | 1999-10-15 | Autocontrolled gas mixing pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1073878C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1326603C (en) * | 2005-10-25 | 2007-07-18 | 王新民 | Full-automatic glue making machine and full-automatic control method |
| CN105181860B (en) * | 2015-08-11 | 2017-04-05 | 昆山禾信质谱技术有限公司 | The control method of the gas concentration quasistatic adjustment equipment fed back based on mass spectrum |
| CN107246378A (en) * | 2017-07-05 | 2017-10-13 | 江苏大学 | A kind of liquid material gradient feed arrangement |
| CN109508049A (en) * | 2018-10-31 | 2019-03-22 | 上海仪器仪表自控系统检验测试所有限公司 | The bottled calibrating gas preparation method that gas test uses |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US560565A (en) * | 1896-05-19 | Journal-box | ||
| US5664560A (en) * | 1995-02-08 | 1997-09-09 | Puritan-Bennett Corporation | Gas mixing apparatus for a ventilator |
-
1999
- 1999-10-15 CN CN99114490A patent/CN1073878C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US560565A (en) * | 1896-05-19 | Journal-box | ||
| US5664560A (en) * | 1995-02-08 | 1997-09-09 | Puritan-Bennett Corporation | Gas mixing apparatus for a ventilator |
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| Publication number | Publication date |
|---|---|
| CN1255402A (en) | 2000-06-07 |
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