CN101067751A - Micro-flow quantitative control system - Google Patents
Micro-flow quantitative control system Download PDFInfo
- Publication number
- CN101067751A CN101067751A CNA2007100490829A CN200710049082A CN101067751A CN 101067751 A CN101067751 A CN 101067751A CN A2007100490829 A CNA2007100490829 A CN A2007100490829A CN 200710049082 A CN200710049082 A CN 200710049082A CN 101067751 A CN101067751 A CN 101067751A
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- Prior art keywords
- micro
- flow
- control system
- liquid
- impact damper
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
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Abstract
The invention discloses a micro flow quantitative control system used in chemical industry and mechanical industry as well as spraying system, comprising needle valve and electromagnetic value controlled by pulse controller and liquid pulse buffer equipped with loose fillings between inlet and outlet, where the outlet of the needle valve is connected with the inlet of the electromagnetic valve and the outlet of the electromagnetic valve is connected with the inlet of the liquid pulse buffer, and the inlet of the pulse buffer is also connected with gas pipe for leading in compressed air. And it can control liquid flow to several drops each minute, even smaller, and the flow of the effluent fluid is relatively stable.
Description
(1) technical field:
The present invention relates to a kind of flow control system, is a kind of micro-flow quantitative control system specifically.
(2) background technology:
The traditional industry element of control fluid flow is a valve, valve element commonly used in the time will controlling tiny flow quantity is a needle-valve, is several even more hour but want controlling liquid per minute flow, utilize valve that liquid is carried out accurate trickle control, for example: in chemical industry, the interpolation of micro liquid; Site-directed quantitative in the machinery industry is lubricated; When in the spraying system droplet control being reached micron, submicron order, needle-valve equally also can " malfunctioning ".And per minute flows out several liquid control, the latus rectum that requires needle-valve in theory is several silks, although liquid can apply certain pressure, but when it passes through several through hole, because capillary effect, cause the pressure that had originally will decay near zero, if run into small and weak buffer brake on the road in the place ahead or tiny dust is in the way, liquid will halt.Generally speaking, in a lot of use occasions, the control of tiny flow quantity is very unstable, and the probability that faults such as obstruction, cutout occur is higher.
(3) summary of the invention:
At the control defective of above-mentioned needle valve element, the purpose of this invention is to provide a kind of micro-flow quantitative control system of effective control tiny flow quantity.
Can remedy the micro-flow quantitative control system of above-mentioned defective, the key of dealing with problems be make liquid in pipeline not through the control element of too thin latus rectum, avoid the pressure loss in the liquid transfer process, this design comprises that the liquid pulse flow produces system and fluid flow buffer system, and flow pulse produces system and is communicated with buffer system.After the band pressure fluid comes out from liquid storage equipment, enter the liquid pulse flow and produce system, enter the fluid cushion system again, just formed steady, tiny fluid after coming out.
Liquid pulse flow generation system includes needle-valve, solenoid valve, and buffer system is the liquid pulse impact damper, and the mode that the three connects into a system is the import of the outlet connection solenoid valve of needle-valve, and the outlet of solenoid valve is communicated with the import of liquid pulse impact damper.
Solenoid valve is connected with impulse controller by circuit, and the switching time (pulsewidth) and the frequency of solenoid valve are controlled by impulse controller.
The import of liquid pulse impact damper also is communicated with the tracheae that pressurized air is imported, and tracheae is introduced pressurized air in the liquid pulse impact damper, carries away overflowing to liquid pulse device outlet liquid on every side.
Described liquid pulse impact damper comprises snubber assembly, and snubber assembly is the loose shape filler of being located between import of liquid pulse impact damper and the outlet, and the simplest filler is filamentary material or is poroid material.
Described import and outlet preferably lay respectively at the top and the bottom of liquid pulse impact damper.
Described tracheae pipeline is provided with reduction valve, so that regulate the gaseous tension that enters in the liquid pulse impact damper.
The utility model micro-flow quantitative control system also is provided with the fluid flow detection system, and the fluid flow detection system is a flowmeter, and the outlet of flowmeter is communicated with the import of needle-valve.
In the said structure, the given flow radix of needle-valve, its flow of process can be several times or tens times of last use traffic, during fluid process solenoid valve, switching time ratio in the solenoid valve unit interval is controlled by impulse controller, the shut-in time of general solenoid valve is longer than several times to tens times of open-intervals, the latus rectum of needle-valve has just increased several times and even tens times like this, increased the transmission of fluid pressure, build-up of pressure loss when having avoided the narrow and small hole of liquid by several and phenomenon of blocking.The frequency that solenoid valve opens and closes can be regulated according to the needs of the steady degree of fluid.The flow of described needle-valve is by the pulse-width regulated control of impulse controller, after the shape pulse liquid at intermittence that solenoid valve comes out enters the liquid pulse impact damper, under the effect of gravity and surface tension of liquid, liquid flows into filler, fill up the space of filler, be slow overflow situation, be compressed gas in the exit of liquid pulse impact damper by pressure gas and the formed fluid-mixing of liquid at last and release, form fluid-mixing stably.
Advantage of the present invention:
1, micro-flow quantitative control system of the present invention can control to several of per minutes even littler to fluid flow, and the flow of effluent fluid is comparatively steady.
2, the liquid pulse impact damper of the filled formula of air pressure of micro-flow quantitative control system original creation of the present invention, cost of manufacture is low, and operation is simple and reliable for this control method, and operating cost is low.
3, micro-flow quantitative control system of the present invention is applicable to and allows the occasion that gas exists.
(4) description of drawings:
Fig. 1 is a structural representation of the present invention.
Figure number sign: 1, needle-valve; 2, impulse controller; 3, solenoid valve; 4, filler; 5, liquid pulse impact damper; 6, flowmeter; 7, tracheae; 8, reduction valve.
(5) embodiment:
As shown in Figure 1, micro-flow quantitative control system of the present invention comprises flowmeter 6, needle-valve 1, impulse controller 2, solenoid valve 3, liquid pulse impact damper 5, tracheae 7 and reduction valve 8, the connected mode of above-mentioned each element is: the outlet of flowmeter 6 is by the import of pipeline connection needle-valve 1, the outlet of needle-valve 1 is by the import of pipeline connection solenoid valve 3, and the outlet of solenoid valve 3 is by the import of pipeline connection liquid pulse impact damper 5.
As shown in Figure 1, solenoid valve 3 is connected with impulse controller 2 by circuit.Liquid pulse impact damper 5 is vertical cylindrical shell, and its import and outlet lay respectively at the top and the bottom of liquid pulse impact damper 5, is provided with the filler 4 that is made of filamentary material or poroid material in liquid pulse impact damper 5 cylindrical shells between import and the outlet; The import of liquid pulse impact damper 5 also is communicated with tracheae 7, and tracheae 7 is connected with pressure gas, and the pipeline of tracheae 7 is provided with reduction valve 8.
As shown in Figure 1, the initiator elements of liquid flow is a flowmeter 6 in the micro-flow quantitative control system of the present invention, and total liquid source is by the import of pipeline connection flowmeter 6; Liquid pulse impact damper 5 is the end element of liquid flow in the micro-flow quantitative control system of the present invention, the outlet of liquid pulse impact damper 5 is being communicated with conveyance conduit, can be provided with in the conveyance conduit has been the spring-like material of the anti-liquid hammer function of having of prior art, thoroughly solves the small pulsation of interior gas of conveyance conduit and liquid mixing body.
Claims (9)
1, micro-flow quantitative control system comprises that the liquid pulse flow produces system, and it is characterized in that: the fluid flow pulse generating system is communicated with buffer system.
2, micro-flow quantitative control system according to claim 1 is characterized in that:
1., the generation system of liquid pulse flow is the impulse controller of needle-valve and solenoid valve and control electromagnetic valve;
2., buffer system is liquid pulse impact damper (5);
The outlet of needle-valve (1) is communicated with the import of solenoid valve (3), and the outlet of solenoid valve (3) is communicated with the import of liquid pulse impact damper (5).
3, micro-flow quantitative control system according to claim 2 is characterized in that:
Solenoid valve (3) is connected with impulse controller (2) by circuit; The switching time of solenoid valve (3) is controlled by liquid pulse controller (5).
4, according to claim 1～3 kind of any one described micro-flow quantitative control system, it is characterized in that: the import of liquid pulse impact damper (5) also is communicated with the tracheae (7) that pressure gas is imported, tracheae (7) is introduced pressurized air in the liquid pulse impact damper (5), and the fluid that will overflow to liquid arteries and veins impact damper (5) outlet carries away uniformly.
5, micro-flow quantitative control system according to claim 4 is characterized in that: liquid pulse impact damper (5) comprises snubber assembly, and snubber assembly is for being located at the loose shape filler (4) between (5) import of liquid pulse impact damper and the outlet.
6, micro-flow quantitative control system according to claim 5 is characterized in that: described filler (4) is filamentary material or poroid material.
7, micro-flow quantitative control system according to claim 4 is characterized in that: described import and outlet lay respectively at the top and the bottom of liquid pulse impact damper (5).
8, according to the described any micro-flow quantitative control system of claim 3～6, it is characterized in that: the pipeline of tracheae (7) is provided with reduction valve (8).
9, according to the described any micro-flow quantitative control system of claim 2～6, it is characterized in that: also be provided with the fluid flow detection system, detection system is flowmeter (6), and the outlet of flowmeter (6) is communicated with the import of needle-valve (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100490829A CN101067751A (en) | 2007-05-10 | 2007-05-10 | Micro-flow quantitative control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100490829A CN101067751A (en) | 2007-05-10 | 2007-05-10 | Micro-flow quantitative control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101067751A true CN101067751A (en) | 2007-11-07 |
Family
ID=38880324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100490829A Pending CN101067751A (en) | 2007-05-10 | 2007-05-10 | Micro-flow quantitative control system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101067751A (en) |
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2007
- 2007-05-10 CN CNA2007100490829A patent/CN101067751A/en active Pending
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |