CN1453489A - Flow regulating valve - Google Patents
Flow regulating valve Download PDFInfo
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- CN1453489A CN1453489A CN 03108100 CN03108100A CN1453489A CN 1453489 A CN1453489 A CN 1453489A CN 03108100 CN03108100 CN 03108100 CN 03108100 A CN03108100 A CN 03108100A CN 1453489 A CN1453489 A CN 1453489A
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- valve
- flap
- pump
- storage cylinder
- liquid storage
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Abstract
The flow regulating valve includes valve body with straight tubular cavity, elastic cylindrical membrane valve clack with two end fixed on the valve body and forming one valve clack cavity together with the inner wall of the valve body, sealed liquid cavity filled with liquid medium outside the valve body and pump. When the valve is opened, the liquid cavity and the valve clack cavity are communicated with the outlet and the inlet of the pump separately; and when the valve is closed, the liquid cavity and the valve clack cavity are communicated with the inlet and the outlet of the pump separately. When liquid medium is injected from the liquid cavity to the valve clack, the elastic membrane valve clack expands to the flow passage and the flow passage has reduced section and thus decreased opening; and vice versa. The flow passage is always circular, so the valve has less jamming.
Description
Affiliated technical field
The present invention relates to a kind of valve, be particularly useful for flow control the bigger non-Newtonian fluid of stickiness.
Background technique
The big I of ducted fluid flow is controlled by valve, and the principle of valve controlling flow amount is, valve correspondingly increases or reduced flow section, thereby make the fluid that passes through increase or reduce opening big or closing hour.Existing flow control valve according to its difference of regulating the critical component of flow section size, can be divided into gate valve, stop valve, ball valve, stopcock etc.These valves all have a common characteristic, that is, from large to small the time, the shape of its flow section will change in open degree, and when little open degree, flow section becomes a slit that width is very little, are crescent shape as the flow section of gate valve when the little open degree.If bigger impurity of particle or fluid thickness are arranged in the fluid, the obstruction when just causing little open degree easily is difficult to guarantee continuous operation under small flow, as the concentrated body refuse in the water treatment plant, contain the chemical industry fluid of particle etc.Cause the reason of this phenomenon to be, along with reducing of open degree, the shape of flow section has progressively become slit-shaped from circle.Chinese patent 97235087 discloses a kind of bivalve diaphragm type hydraulic control valve, and when general aperture, its flow section is a streamline, can prevent to stop up, but the slit ringwise of the flow cross-section during little open degree still easily results in blockage.
Summary of the invention
Technical problem to be solved by this invention is: even a kind of flow control valve that stops up valve such as non-Newtonian fluids such as concentrating body refuse that also can not cause under little open degree state is provided.
The imagination that the present invention addresses the above problem is: according to fractal principle, and when basal area is identical, in all section configurations, the girth minimum of circular cross section, the fluid resistance minimum to by this section is difficult for resulting in blockage most.Utilize this principle, the present invention is circular with valve body flow channels Section Design, and in opening-closing process shape invariance.
The technological scheme that addresses the above problem is: the flow control valve that is provided comprises valve body and is positioned at the flap of body cavity.Said body cavity is a straight-tube shape, said flap is a cylindrical shape elastic membrane flap, the two ends of this elastic membrane flap are fixed on the tubular valve body, and surround an airtight flap chamber with valve interior wall, the outside of tubular valve body is provided with airtight liquid storage cylinder and pump of full of liquid medium, flexible air bag in the liquid storage cylinder.Above-mentioned flap chamber links to each other with pump by pipeline with liquid storage cylinder, its Placement can regulate, and mode is such: liquid storage cylinder links to each other with delivery side of pump when driving valve, and the flap chamber links to each other with the import of pump; Liquid storage cylinder links to each other with the import of pump when driving valve, and the flap chamber links to each other with delivery side of pump.
Under nature, when promptly flow channels was in maximum opening state, the elastic membrane flap was close to the valve body cavity wall, and the flap cavity volume is zero.When pump is extracted liquid medium out from liquid storage cylinder, and when sending into the flap chamber, pressure raises in the flap chamber, expands in the flap chamber, and pressure is compressed the flow channels section to the flow channels expansion to the elastic membrane flap in flap chamber in flap the chamber in because of being subjected to, and open degree reduces.Otherwise when pump is extracted liquid medium out from the flap chamber, and when sending into liquid storage cylinder, shrink in the flap chamber, and the flow channels section increases, and open degree increases.Because columnar elastic membrane flap is axisymmetric, the thermal expansion of all directions is identical, thereby the flow channels section configuration after it expands is always circular, thereby even has reached the purpose that also can not stop up when little open degree.When the open degree of valve changes, liquid medium volume in the liquid storage cylinder will increase and decrease, because gas has compressibility, the air bag in the liquid storage cylinder is contraction or expansion thereupon, the variation of the space region liquid volume that the liquid medium increase and decrease is brought so that the compensation liquid storage cylinder is interior.
Above-mentioned pump can adopt metering pump or bidirectional measuring pump, also can adopt other current stabilization pump.
Because the present invention adopted the cylindrical shape elastic membrane to do flap, and liquid medium is charged into or extracts out the flap chamber by hydraulic way and regulate open degree, not only easy to operate, reliable, be convenient to control automatically; And the flow channels section configuration of valve is always circular, guaranteed the unblocked of when little open degree non-Newtonian fluid.
The present invention can be used as duty valves such as general keying valve, reduction valve, Decompression valves and uses, and is particularly useful for controlling the bigger little open degree throttling control that waits non-Newtonian fluid of stickiness, as being used as soil discharging valve, blowdown valve etc.
Description of drawings
Accompanying drawing is the structural drawing of one embodiment of the invention.
Embodiment
As shown in drawings: valve body 2 is rigid pipes, and for cylindric, its two ends have flange plate 15.Elastic membrane flap 1 adopts pipe shape rubber flap, with taper pressure ring 20 the sealed at both ends of pipe shape rubber flap is fixed on the valve body 2, make and form an airtight flap chamber 5 between the inwall of valve body 2 and the rubber membrane flap, the central space zone that elastic membrane flap 1 surrounded is flow channels 4.Be connected around the outer wall of the valve body 2 dome shell 3 of an evagination surrounds an airtight liquid storage cylinder 6 between the outer wall of this dome shell 3 and valve body 2, be full of liquid medium in the liquid storage cylinder 6, and placed two annular air-pockets 7.The top of liquid storage cylinder 6 is provided with exhaust nozzle 16, and the bottom is provided with emptying mouth 18.Air bag 7 is provided with gas filling mouth 17, and stretches out dome shell 3, is used for inflation and tonifying Qi.Link to each other with liquid storage cylinder liquid in-out pipe 14 by flap chamber liquid in-out pipe 13 between flap chamber 5 and the liquid storage cylinder 6, be connected with metering pump 8, liquid storage cylinder feed liquor valve 9, flap chamber feed liquor valve 10, liquid storage cylinder liquid valve 11 and flap chamber liquid valve 12 on the connecting pipeline.Above liquid in-out pipe, valve and metering pump are to be connected like this: flap chamber liquid in-out pipe 13 is told two arms and is linked to each other with metering pump, and the import of an arm metering pump links to each other, and flap chamber liquid valve 12 is installed on this arm; Another arm links to each other with the metering pump outlet, and flap chamber feed liquor valve 10 is installed on this arm.In like manner, liquid storage cylinder liquid in-out pipe 14 also has two arms and metering pump to import and export to link to each other, with installation liquid storage cylinder liquid valve 11 on the arm that the metering pump import links to each other, installation liquid storage cylinder feed liquor valve 9 on another arm.So, control the open and close of above-mentioned four liquid inlet and outlet valves, can realize the different coupled condition of flap chamber 5, liquid storage cylinder 6 and 8 of metering pumps, finish out the valve process and close the valve process.When first state, promptly open the valve process: open liquid storage cylinder feed liquor valve 9 and flap chamber liquid valve 12, close liquid storage cylinder liquid valve 11 and flap chamber feed liquor valve 10, that is, liquid storage cylinder 6 links to each other with the outlet of metering pump 8, and flap chamber 5 links to each other with the import of metering pump 8.Start metering pump 8, liquid medium is sent into liquid storage cylinder 6 by metering pump 5 extractions from the flap chamber.Liquid medium in the flap chamber 5 reduces, and pressure descends, and flap chamber 5 and rubber flap shrink, and flow channels 4 enlarges, and valve is opened greatly.Meanwhile, the liquid medium in the liquid storage cylinder 6 increases, and pressure gos up, and air bag 7 is compressed.When second state, promptly close the valve process: open liquid storage cylinder liquid valve 11 and flap chamber feed liquor valve 10, close liquid storage cylinder feed liquor valve 9 and flap chamber liquid valve 12, that is, liquid storage cylinder 6 links to each other with the import of metering pump 8, and flap chamber 5 links to each other with the outlet of metering pump 8.Open metering pump 8, liquid medium is extracted out from liquid storage cylinder 6 by metering pump 8, sends into flap chamber 5.Liquid medium in the liquid storage cylinder 6 reduces, and pressure descends, and air bag 7 expands.Meanwhile, the liquid medium in the flap chamber 5 increases, and pressure raises, expand in flap chamber 5, the rubber flap is subjected to pressing in the flap chamber and expands (its state as shown in phantom in FIG.) to flow channels 4, and flow channels 4 is occupied by the flap chamber, section shrinks, and valve is turned down.
During initial the installation, in air bag 7, inject air in certain amount, liquid storage cylinder 6 is filled liquid medium by gas filling mouth 17, and by the air in the exhaust nozzle 16 eliminating liquid storage cylinders.Under full-gear, the elastic caoutchouc flap is in tension, and flap is close to the valve body tube wall, and the flap cavity volume is zero, and the section of flow channels 4 is in maximum rating.
If adopt the bidirectional measuring pump, then liquid storage cylinder 6 links to each other with two ports of bidirectional measuring pump respectively with flap chamber 5, can omit four liquid inlet and outlet valves on the above-mentioned pipeline like this.
Present embodiment also is provided with a control gear 19, the open degree that is used for autocontrol valve, the open degree of valve was determined by the operating time of metering pump: when closing valve, the metering pump operating time is long more, the liquid medium of pumping to the flap chamber is many more, and the flap chamber is expanded greatly more, and flow channels is shunk more for a short time, open degree is just more little, and vice versa.The control principle of valve opening degree is as follows:
If the open degree of definition valve be the ratio of flow channels diameter a flow channels diameter D during with full-gear of reality, i.e. open degree
。Then the open degree of valve depends on the volume of liquid medium in the flap chamber, and volume is many more, and open degree is more little.Think that the longitudinal section of rubber flap is shaped as one section circular arc when expand in the flap chamber if be similar to, then the relation of flap cavity volume V and open degree K satisfies following formula:
In the formula:
L is the length of valve body.Formula (1) has reflected the relation of open degree K and flap cavity volume, and the volume in flap chamber equals the volume of the liquid medium that metering pump pumps in the flap chamber, the time that metering pump is pumped is long more, the flap cavity volume is big more, valve opening degree is more little, can set up the one-to-one relationship of metering pump accumulative total operating time and valve opening degree thus.It is fine that this corresponding relation and quadratic curve coincide, and can utilize this corresponding relation, by the accumulative total operating time of control metering pump, thereby reaches the purpose of control valve open degree.
The valve automatic control process is as follows: establishing original state is full-gear, and open degree is 1, and the accumulative total Running pump time is zero.Metering pump 8 is when 5 fluid injections of flap chamber, and the metering pump operating time is for just.Quit work when reaching a certain open degree, control gear 19 is remembered the metering pump Cumulative time.When next time, metering pump was worked,, then on the former Cumulative time, continue the positive operating time of accumulative total if remain to 5 fluid injections of flap chamber.If at this moment metering pump is discharged the liquid medium in the flap chamber, the metering pump operating time is negative, then the operating time of bearing on adding up on the former Cumulative time.That is, when the fluid injection of flap chamber, the metering pump operating time, during the discharge opeing of flap chamber, the operating time was for negative for just.With the relation curve input control device 19 of metering pump accumulative total operating time and valve opening degree, then at any time, the open degree of valve all can calculate according to the metering pump accumulative total operating time at that time.Equally, at any time, to control gear 19 input instruction open degree, the size of control gear 19 at first compare instruction open degree and existing open degree, decision are to fluid injection of flap chamber or discharge opeing, thus those unlatchings in the instruction liquid inlet and outlet valve 9,10,11,12, those are closed, and calculate the Running pump time of needs according to the difference of instruction open degree and existing open degree, the work of instruction metering pump is until the open degree that reaches needs.
Claims (4)
1, a kind of flow control valve, comprise valve body (2) and be positioned at the flap of body cavity, it is characterized in that said valve body (2) inner chamber is a straight-tube shape, said flap is a cylindrical shape elastic membrane flap (1), the two ends of this elastic membrane flap (1) are fixed on the tubular valve body (2), and surround an airtight flap chamber (5) with valve interior wall, the outside of tubular valve body (2) is provided with the airtight liquid storage cylinder (6) and a pump (8) of full of liquid medium, above-mentioned flap chamber (5) links to each other with pump (8) by pipeline with liquid storage cylinder (6), their Placement is such: liquid storage cylinder when driving valve (6) links to each other with the outlet of pump (8), and flap chamber (5) link to each other with the import of pump (8); Liquid storage cylinder (6) links to each other with the import of pump (8) when closing valve, and flap chamber (5) link to each other with the outlet of pump (8); In aforesaid liquid storage cylinder (6), be provided with air bag (7).
2,, it is characterized in that said pump (8) is a metering pump as the said flow control valve of claim 1.
3,, it is characterized in that said metering pump is the bidirectional measuring pump as the said flow control valve of claim 2.
4, as claim 1,2 or 3 said flow control valves, it is characterized in that said valve body (2) for cylindric, airtight liquid storage cylinder (6) is surrounded by the outer wall of dome shell (3) with valve body (2).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN 03108100 CN1220831C (en) | 2003-05-28 | 2003-05-28 | Flow regulating valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN 03108100 CN1220831C (en) | 2003-05-28 | 2003-05-28 | Flow regulating valve |
Publications (2)
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CN1453489A true CN1453489A (en) | 2003-11-05 |
CN1220831C CN1220831C (en) | 2005-09-28 |
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Family Applications (1)
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CN 03108100 Expired - Fee Related CN1220831C (en) | 2003-05-28 | 2003-05-28 | Flow regulating valve |
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Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100363661C (en) * | 2005-10-18 | 2008-01-23 | 周明泉 | Multifunctional flexible hydraulic control valve |
CN106040323A (en) * | 2016-05-23 | 2016-10-26 | 东南大学 | Microfluidic gas damper and adjusting method |
TWI620901B (en) * | 2013-01-30 | 2018-04-11 | Ace Inc | Exhaust pressure and exhaust flow controller |
CN108286514A (en) * | 2018-01-09 | 2018-07-17 | 上海绩优机电股份有限公司 | With the multistage side channel pump for adjusting range |
CN110043684A (en) * | 2019-05-27 | 2019-07-23 | 马荣立 | A kind of embolism valve |
CN110397151A (en) * | 2019-06-19 | 2019-11-01 | 武汉圣禹排水***有限公司 | A kind of adjustable flexible cut-off equipment |
CN110966669A (en) * | 2018-09-29 | 2020-04-07 | 宁波方太厨具有限公司 | Kitchen air conditioning system |
CN114572439A (en) * | 2022-04-07 | 2022-06-03 | 台州市祥珑食品容器科技股份有限公司 | Filling tube control structure |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100439774C (en) * | 2007-01-26 | 2008-12-03 | 清华大学 | Air-actuated block valve |
-
2003
- 2003-05-28 CN CN 03108100 patent/CN1220831C/en not_active Expired - Fee Related
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100363661C (en) * | 2005-10-18 | 2008-01-23 | 周明泉 | Multifunctional flexible hydraulic control valve |
TWI620901B (en) * | 2013-01-30 | 2018-04-11 | Ace Inc | Exhaust pressure and exhaust flow controller |
CN106040323A (en) * | 2016-05-23 | 2016-10-26 | 东南大学 | Microfluidic gas damper and adjusting method |
CN106040323B (en) * | 2016-05-23 | 2018-04-03 | 东南大学 | A kind of micro-fluidic gas damper and adjusting method |
CN108286514A (en) * | 2018-01-09 | 2018-07-17 | 上海绩优机电股份有限公司 | With the multistage side channel pump for adjusting range |
CN110966669A (en) * | 2018-09-29 | 2020-04-07 | 宁波方太厨具有限公司 | Kitchen air conditioning system |
CN110043684A (en) * | 2019-05-27 | 2019-07-23 | 马荣立 | A kind of embolism valve |
CN110397151A (en) * | 2019-06-19 | 2019-11-01 | 武汉圣禹排水***有限公司 | A kind of adjustable flexible cut-off equipment |
CN114572439A (en) * | 2022-04-07 | 2022-06-03 | 台州市祥珑食品容器科技股份有限公司 | Filling tube control structure |
CN114572439B (en) * | 2022-04-07 | 2023-10-17 | 台州市祥珑食品容器科技股份有限公司 | Filling tube control structure |
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CN1220831C (en) | 2005-09-28 |
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Granted publication date: 20050928 |