CN1130100A - Automatically controlling method and equipment for jet-pipe method dynamic air distribution - Google Patents
Automatically controlling method and equipment for jet-pipe method dynamic air distribution Download PDFInfo
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- CN1130100A CN1130100A CN95108354.6A CN95108354A CN1130100A CN 1130100 A CN1130100 A CN 1130100A CN 95108354 A CN95108354 A CN 95108354A CN 1130100 A CN1130100 A CN 1130100A
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- magnetic valve
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Abstract
This invented automatic control method and its equipment have the function relationship between distributed gas concentration and time already given, and thus, the distributed gas total amount and concentration automatic control can be realized through the accurate control method of distributed gas time. The time control circuit can be set by a specified distributed gas time to control the open/shut state of the electromagnetic valve, this can realize the above-mentioned method. Electromagnetic valve is installed in front of jet tube for control of distributed gas total amount, and electromagnetic valve between dilution containers and is mainly required for control of distributed gas concentration after the reflux branch.
Description
The invention belongs to calibrating gas preparation technique field, specifically, it relates to the autocontrol method and the equipment of fluid jet dynamic air-distributing.
Air distributing method commonly used has two kinds: a kind of is static distribution, and another kind is a dynamic air-distributing.Static distribution is compared with dynamic air-distributing and is had many known shortcoming and defect.Used dynamic air-distributing method has a variety of, as: fast pumpdown formula dynamic air-distributing, infiltration type dynamic air-distributing, diffusion method dynamic air-distributing etc., the required device of these dynamic air-distributing methods is complicated, operating condition is harsh, the factor that influences the distribution accuracy is more, the preparation total amount and the concentration level of desire preparation component are difficult to control, throughput and distribution concentration are difficult to coordinate in the distribution process, also can't accurately prepare the gas of trace concentration level.Above-mentioned these dynamic air-distributing methods, automaticity is low, does not possess the final assembly condition, and common laboratory can't be used for preparing calibrating gas at all.Lanzhou Inst. of Chemical Physics, Chinese Academy of Sciences has overcome many shortcoming and defect of above-mentioned these dynamic air-distributing methods in a kind of analogue means that utilizes the jet current principle preparing calibrating gas of the second phase in 1992 " analytical instrument " introduction.But this device does not design automatic control section, so just can't realize the accurately control automatically to distribution total amount and distribution concentration level yet.
The purpose of this invention is to provide the method for automatic control criterion gas preparation total amount of a kind of energy and compound concentration level, and realize the equipment that this method adopts.
To achieve these goals, the technical solution used in the present invention is: also be provided with two and can only use the accurately magnetic valve of control of time control circuit in the jet pipe method distribution flow process that document provided.A primary air end that is arranged at this device is used to control the distribution total amount, and another is arranged between two cut-back tanks, and also requires after the backflow branch road, is mainly used in control distribution concentration level.Derive as can be known from the given Mathematical Modeling of document, between gas concentration C (t) that time t is allotted constantly and the time t is the index functional relation, therefore, after definite main flow and return flow, can calculate the required distribution time according to the gas concentration and the preparation total amount of required preparation, and required time is provided with to time control circuit, this time control circuit has timing to give and puts function, and all can export control signal when distribution begins and finish.The present invention utilizes these functions of time control circuit exactly, realizes purpose of the present invention by the switching time of two magnetic valves in the sync control device flow process.
The present invention will transfer the accurate control to the distribution time to the accurate control of distribution concentration and total amount to, thereby improve the automaticity of distribution greatly by above-mentioned technical solution.The present invention can effectively realize the automatic distributing control of any concentration level and total amount, especially is fit to the long-time distribution of light concentration gas, has reduced the error that human factor causes, and has improved the precision of distribution.
Describe optimum implementation of the present invention in detail below in conjunction with accompanying drawing.
Fig. 1 is a device flow chart of the present invention, it among the figure the set position of magnetic valve 1 and magnetic valve 4, they control its open and-shut mode by time control circuit, when distribution begins, time control circuit 5 makes magnetic valve 1 and magnetic valve 4 be in opening simultaneously, the primary air amount produces certain negative pressure by establishing stream pipe 2, the gas in the cut-back tank 9 is extracted out a diverter branch is set behind jet pipe 2, and form the backflow of certain flow between container 9 and the jet pipe 2.Annotate the desire combo part of advancing from injector 6, bring in the container 9 by backflow, after the dilution again with jet pipe in primary air fully mix, mixed gas flows in the containers 10 through magnetic valve 4.Give the distribution of putting during the time when device runs to, time control circuit will make magnetic valve 1 and magnetic valve 4 synchronizing closes, finish distribution.At this moment magnetic valve 1 will cut out the control that primary air is finished the distribution total amount, this moment, jet pipe did not produce negative pressure yet, backflow stops, meanwhile, magnetic valve 4 will cut off the back flow of gas that produces owing to pressure differential between container 9 and the container 10, and magnetic valve 4 and magnetic valve 1 are finished the control of distribution concentration level jointly.
Claims (4)
1, a kind of autocontrol method of jet pipe method dynamic air-distributing is characterized in that: after main flow, capacity of returns and cut-back tank volume are determined, realize automatic control to distribution total amount and distribution concentration by the automatic control to the air distributing device distribution time.
2, a kind of automatic control equipment that is used for claim 1 method, comprise magnetic valve (1) and magnetic valve (4) and the time control circuit (5) that is used for controlling magnetic valve (1) and magnetic valve (4), it is characterized in that: magnetic valve (1) is installed on primary air the place ahead of jet pipe (2), be used to control the distribution total amount, magnetic valve (4) is installed between cut-back tank (9) and the cut-back tank (10), also be required after the backflow branch road, be mainly used in control distribution concentration.
3, automatic control equipment according to claim 2, it is characterized in that: time control circuit (5) has the distribution time to give and puts function, give the distribution of putting during the time when device runs to, time control circuit (5) can be exported the duty that control signal is controlled magnetic valve (1) and magnetic valve (4).
4, magnetic valve according to claim 3 (1) and magnetic valve (4), it is characterized in that: magnetic valve (1) and magnetic valve (4) have two kinds of duties, when distribution begins, magnetic valve (1) and magnetic valve (4) are opened synchronously, when distribution finishes, magnetic valve (1) and magnetic valve (4) synchronizing close.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95108354.6A CN1130100A (en) | 1995-07-03 | 1995-07-03 | Automatically controlling method and equipment for jet-pipe method dynamic air distribution |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95108354.6A CN1130100A (en) | 1995-07-03 | 1995-07-03 | Automatically controlling method and equipment for jet-pipe method dynamic air distribution |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1130100A true CN1130100A (en) | 1996-09-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95108354.6A Pending CN1130100A (en) | 1995-07-03 | 1995-07-03 | Automatically controlling method and equipment for jet-pipe method dynamic air distribution |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1130100A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042484A (en) * | 2009-10-16 | 2011-05-04 | 北京均方理化科技研究所 | Normal-pressure and room-temperature dynamic gas distribution system and gas distribution method thereof |
| CN109531366A (en) * | 2017-09-21 | 2019-03-29 | 上汽通用五菱汽车股份有限公司 | A kind of timing hand-held electrode grinding device |
-
1995
- 1995-07-03 CN CN95108354.6A patent/CN1130100A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102042484A (en) * | 2009-10-16 | 2011-05-04 | 北京均方理化科技研究所 | Normal-pressure and room-temperature dynamic gas distribution system and gas distribution method thereof |
| CN109531366A (en) * | 2017-09-21 | 2019-03-29 | 上汽通用五菱汽车股份有限公司 | A kind of timing hand-held electrode grinding device |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |