CN201810832U - Bidirectional combined low pressure difference diaphragm type one-way valve for pressure swing adsorption oxygen generator - Google Patents
Bidirectional combined low pressure difference diaphragm type one-way valve for pressure swing adsorption oxygen generator Download PDFInfo
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- CN201810832U CN201810832U CN2010202729174U CN201020272917U CN201810832U CN 201810832 U CN201810832 U CN 201810832U CN 2010202729174 U CN2010202729174 U CN 2010202729174U CN 201020272917 U CN201020272917 U CN 201020272917U CN 201810832 U CN201810832 U CN 201810832U
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Abstract
The utility model discloses a bidirectional combined low pressure difference diaphragm type one-way valve for a pressure swing adsorption oxygen generator. The bidirectional combined low pressure difference diaphragm type one-way valve is characterized by consisting of an air inlet valve body, an air outlet valve body, an O-shaped sealing ring, a diaphragm, a limit pressing plate, a fastening bolt, a counter bore bolt and a tough gasket. The outlet pressures of two adsorption towers are alternately changed in the pressure swing adsorption oxygen generating process, and the outlet pressures of the two towers are high and low respectively, so when a certain air inlet passage (an air inlet passage A or an air inlet passage B) of the one-way valve is in high pressure and the other passage (the air inlet passage B or the air inlet passage A) is in a low pressure state, cross flow between the air inlet passage A and the air inlet passage B is avoided, bidirectional combination of airflow is realized, that is, the airflow from different directions is finally discharged from one path, and parts are greatly reduced. When the airflow flows reversely, the diaphragm pressed by the limit pressing plate is not misplaced to produce local air leakage. The pressure difference for opening the diaphragm is low, so resistance loss is reduced; and the airflow is not blocked.
Description
Affiliated technical field
The utility model relates to a kind of bi-directional combination diaphragm type one-way valve that is used for the pressure change adsorption type oxygenerator.
Background technique
In recent years, along with the raising of system oxygen molecular sieve performance, the omnibus control system technology has obtained swift and violent development.So-called transformation absorption is meant at a certain temperature, according to the extent of adsorption difference of different adsorbates under different pressures on the same sorbent, and by changing this thermomechanics parameter of pressure, the cyclic process that different adsorbates are separated.With the air-separating oxygen-making is example, and omnibus control system is to be core with the zeolite adsorbent, selects absorption nitrogen according to sorbent under elevated pressures, air is carried out the cyclic process of nitrogen, oxygen separation.The segregating unit main body generally comprises two adsorption towers and an oxygen container, whole adsorption cycle is finished in two steps, the first step: one of them adsorption tower (L) carries out high pressure absorption, and the high oxygen concentration that top of tower is produced exports oxygen container to, and another tower (R) carries out desorb from the bottom; The second step R tower carries out high pressure absorption, and the oxygen that the upper end produces drains into oxygen container, and the L tower carries out desorb.Circulate so repeatedly, guarantee to have in the oxygen container high oxygen concentration of elevated pressures all the time always.Like this, requiring must have an one-way valve between two adsorption towers and the oxygen container, and when making the adsorber desorb be in low-pressure state, the oxygen in the oxygen container is unlikely to be back in the stripper.At present, pressure swing adsorption oxygen making device generally adopts two independently one-way valves, and one-way valve mostly is spring, and promptly when high voltage terminal and low voltage terminal pressure reduction during greater than the elastic force of spring, air pressure backs down the piston of being made up of steel ball, steel pricker and so on, the air communication mistake; Otherwise when high voltage terminal and low voltage terminal pressure reduction during less than the elastic force of spring, the elastic force of spring promotes piston and withstands gas circuit, thereby realizes the purpose of " unidirectional ".The advantage of this one-way valve is to bear higher pressure reduction, but this kind valve is unfavorable for omnibus control system, and reason is:
(1) the one-way valve latus rectum is less, has limited gas flow.
(2) spring pressure is higher, and high voltage terminal and low voltage terminal pressure reduction could promote piston in the time of must being higher than a certain pressure.
(3) the one-way valve horizontal positioned can influence switch pressure with vertical placement, when vertical placement, when piston is positioned at the spring below, because piston is generally steel part, quality is bigger, and high voltage terminal and low voltage terminal pressure reduction must overcome spring force simultaneously and piston gravity just can be opened gas circuit; Otherwise piston is in spring when top, and the piston self gravitation again can pressure spring, and piston is opened, and causes gas leakage.
Adsorption tower is when oxygen container injects high oxygen concentration in the pressure swing adsorption oxygen, pressure reduction be one by height to low decline process, ideally, the oxygen of the adsorption tower upper end when hope will be in high pressure absorption drains into oxygen container as far as possible, improves oxygen output.But, owing to adopt the spring one-way valve, can cause pressure reduction a certain threshold value in the decline process, to occur, close gas circuit in advance, reduced gas production.
Another kind of one-way valve is as gas circuit membrane type one-way valve as described in the ZL 97234431.4, though this kind one-way valve adopts diaphragm type, air-flow will pass through porous channel when high voltage terminal flows to low voltage terminal, limited gas flow; And the problem that also can occur spring-like formula one-way valve when this kind one-way valve is vertically placed, the diaphragm self gravitation can be opened gas circuit in advance, causes gas leakage.
ZL200520113827.X provides a kind of diaphragm type one-way valve that is used for ozone/Ozone Water loop, this kind one-way valve is similar to ZL 97234431.4, but it is characterized in that diaphragm thickness is 0.03-0.2mm, therefore, when bearing big pressure reduction, film easily is damaged, and is unsuitable for the bigger occasion of pressure reduction excursion.The one-way valve that is applied to pressure-swing absorption process must satisfy following some:
(1) to oxygen container, can not reflux by the centre from an adsorption tower way flow for gas;
(2) can bear bigger pressure reduction excursion, 0～4bar;
(3) no matter how valve is placed, and phenomenon can not leak air;
(4) highly sensitive, in less pressure differential range, can be communicated with gas circuit.
Along with developing rapidly of omnibus control system, its scale is increasing, and one-way valve has become a vital accessory, in order to reduce cost, weight reduction and minimizing number of fitting parts, the box-like one-way valve of development group is the modular important component part of pressure swing adsorption oxygen making device.
Summary of the invention
The purpose of this utility model provides a kind of big flux, low differential pressure, highly sensitive bi-directional combination low differential pressure diaphragm type one-way valve, solve the gas leak phenomenon of traditional diaphragm one-way valve, integrate two one-way valves simultaneously, structure is compact more, can bear bigger reverse pressure.Be specially adapted to the omnibus control system process, be applicable to air-flow one-way flow link in other gas separation too.
A kind of bi-directional combination low differential pressure diaphragm type one-way valve that is used for pressure swing adsorption oxygen, it is characterized in that, this one-way valve is made up of air inlet valve body 1, the valve body 2 of giving vent to anger, O RunddichtringO 3, diaphragm 4, spacing compressing tablet 5, clamping bolt 6, countersunk bolts 7 and toughness pad 8, wherein A gas-entered passageway 9 and B gas-entered passageway 10 all have an air inlet concave station 14 in the air inlet valve body, C outlet passageway 12 boss 13 of giving vent to anger of outlet valve body, air-flow is flowed into by A gas-entered passageway 9 and B gas-entered passageway 10, enter cavity 11 through extruding diaphragm 4, flow out through C outlet passageway 12 again.
Because two adsorption tower outlet pressures change alternately in the omnibus control system process, the two towers pressure of working off one's feeling vent one's spleen is one high and one low, therefore, bi-directional combination low differential pressure diaphragm type one-way valve A gas-entered passageway (or B gas-entered passageway) is when being in high pressure, B gas-entered passageway (or A gas-entered passageway) is in low-pressure state, two passage crossfire phenomenons can not occur.
Wherein said air inlet valve body can also can be formed by plastic processings such as teflon by plastic bad processing and fabricatings of metal hair such as aluminium, copper with the valve body of giving vent to anger.
Concave station is for nut designs in described air inlet valve A gas-entered passageway and the B gas-entered passageway, guarantees to have good air tightness.
The described valve body C outlet passageway boss of giving vent to anger is in order to save material, and weight reduction guarantees installation strength simultaneously.
Other toughness pad that the core component diaphragm can adopt 0.1～1mm silicagel pad, rubber pad or have elastic return in the described valve body, central authorities are with holes, and are used to install clamping bolt, guarantee can open diaphragm under less stream pressure.
Described spacing compressing tablet is difficult for misplacing when keeping diaphragm to open, and when pressure reduction reduced, diaphragm can restore to the original state, and the central punching of spacing compressing tablet is greater than the clamping bolt external diameter.
Clamping bolt can position spacing compressing tablet and diaphragm, when bi-directional combination low differential pressure diaphragm type one-way valve is in vertical placement, diaphragm can not break away from the origin-location under clamping bolt and spacing compressing tablet effect, diaphragm prevents the gas leakage and the generation of collaborating at self elastic force effect lower seal position gas-entered passageway.
Described valve body hollow cavity is the significant points that guarantees the big flux of air-flow, and air-flow can not block because of current limliting when A gas-entered passageway and B gas-entered passageway flow to the C outlet passageway, produces big pressure drop;
The O RunddichtringO is to guarantee that the air inlet valve body is tight with the valve body of giving vent to anger in the described valve body, gas leak phenomenon can not take place, and also can adopt modes such as screw thread, welding, splicing to seal.
Countersunk bolts is in order to guarantee that the air inlet valve body and the valve body of giving vent to anger are mounted to whole valve body in the described valve body.
Described toughness pad is to guarantee that countersunk bolts can generation cavity body drain gas in reinforcing process, and the toughness pad can not adopt metal or other hard material.
The installation process of described valve body is as follows:
Diaphragm is placed on air inlet valve body upper face center position, pushes down diaphragm, clamping bolt is penetrated in the screw thread of air inlet valve body central authorities by spacing compressing tablet and diaphragm, tighten with spacing compressing tablet.The O RunddichtringO is placed on the valve body platform of giving vent to anger, fasten with the air inlet valve body then, the toughness pad is placed the counterbore at air inlet valve body back, put into countersunk bolts again, tighten with hexagon wrench.One-way valve installs.
Description of drawings
Fig. 1 is the structural representation of bi-directional combination low differential pressure diaphragm type one-way valve of the present utility model, and left-half is a sectional drawing, and right half part is a plan view.
Fig. 2 is that valve body is from H-H tangent plane elevational schematic view.
Fig. 3 is that valve body is from H-H tangent plane schematic top plan view.
Among Fig. 1: 1. air inlet valve body; 2. the valve body of giving vent to anger; The boss 14. air inlet concave stations 3.O RunddichtringO 4. diaphragms 5. spacing compressing tablet 6. clamping bolts 7. countersunk bolts 8. toughness pad 9.A gas-entered passageway 10.B gas-entered passageways 11. cavity 12.C outlet passageways 13. are given vent to anger
Embodiment
Referring to Fig. 1, Fig. 2 and Fig. 3, diaphragm 4 is positioned over plane on the air inlet valve body 1, is as the criterion to cover A gas-entered passageway and B gas-entered passageway, places spacing compressing tablet 5 again, and is fixing by clamping bolt 6.Air inlet valve body 1 seals by O RunddichtringO 3 and toughness pad 8 with the valve body 2 of giving vent to anger, reinforce by countersunk bolts 7, when pressure swing adsorption oxygen one tower (to call the A tower in the following text) is in high pressure absorption product oxygen, another tower (to call the B tower in the following text) is in desorption state, at this moment, A tower upper end oxygen pressure is higher, flow to diaphragm 4 places by bi-directional combination low differential pressure diaphragm type one-way valve A gas-entered passageway 9, because cavity 11 internal pressures are lower, oxygen opens to spacing compressing tablet 5 one sides under diaphragm 4 front and back differential pressure actions, Oxygen Flow is to cavity 11, because oxygen container one end pressure is lower, oxygen flow to oxygen container by C outlet passageway 12, though the B pressure tower is low, but because B tower terminal membrane sheet 4 has one-way, air-flow can't flow to the B tower from cavity 11; Otherwise when the B tower was in high pressure absorption product oxygen, oxygen flow to cavity 11 through B gas-entered passageway 10, flow to oxygen container again.Like this, valve body has been realized the bi-directional combination of air-flow, and promptly air-flow from different directions finally from one tunnel output, has reduced Component greatly.In use can prevent because of the different gas leak phenomenons that cause of bi-directional combination low differential pressure diaphragm type one-way valve modes of emplacement.Because diaphragm 4 adopts rubber cushion, it is less to open diaphragm 4 required pressure reduction, has reduced drag losses.There is a large volume cavity 11 inside during airflow passes bi-directional combination low differential pressure diaphragm type one-way valve, rather than the duct, can not produce metering function to air-flow.When the air-flow reverse flow, owing to there is spacing compressing tablet 5 to push down diaphragm 4, dislocation can not take place and produce local gas leakage in diaphragm 4.
Claims (4)
1. bi-directional combination low differential pressure diaphragm type one-way valve that is used for pressure swing adsorption oxygen, it is characterized in that, this one-way valve is by air inlet valve body (1), the valve body (2) of giving vent to anger, O RunddichtringO (3), diaphragm (4), spacing compressing tablet (5), clamping bolt (6), countersunk bolts (7) and toughness pad (8) are formed, wherein A gas-entered passageway (9) and B gas-entered passageway (10) all have an air inlet concave station (14) in the air inlet valve body, C outlet passageway (12) boss (13) of giving vent to anger of outlet valve body, air-flow is flowed into by A gas-entered passageway (9) and B gas-entered passageway (10), enter cavity (11) through extruding diaphragm (4), pass through C outlet passageway (12) again and flow out;
Diaphragm (4) and the fastened bolt of spacing compressing tablet (5) (6) are pressed on the air inlet valve body (1), and spacing compressing tablet (5) is in diaphragm (4) top; Air inlet valve body (1) links together by countersunk bolts (7) with the valve body (2) of giving vent to anger.
2. the bi-directional combination low differential pressure diaphragm type one-way valve that is used for pressure swing adsorption oxygen according to claim 1 is characterized in that other toughness rubber cushion that core component diaphragm (4) adopts 0.1～1mm silicagel pad, rubber pad or has elastic return in the valve body.
3. the bi-directional combination low differential pressure diaphragm type one-way valve that is used for pressure swing adsorption oxygen according to claim 1 is characterized in that spacing compressing tablet (5) is made of the thin slice elastic metallic.
4. the bi-directional combination low differential pressure diaphragm type one-way valve that is used for pressure swing adsorption oxygen according to claim 1 is characterized in that valve body hollow cavity (11) sectional area must be greater than A gas-entered passageway (9) and B gas-entered passageway (10) sectional area 1.5 times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202729174U CN201810832U (en) | 2010-07-23 | 2010-07-23 | Bidirectional combined low pressure difference diaphragm type one-way valve for pressure swing adsorption oxygen generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202729174U CN201810832U (en) | 2010-07-23 | 2010-07-23 | Bidirectional combined low pressure difference diaphragm type one-way valve for pressure swing adsorption oxygen generator |
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| CN201810832U true CN201810832U (en) | 2011-04-27 |
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| CN2010202729174U Expired - Fee Related CN201810832U (en) | 2010-07-23 | 2010-07-23 | Bidirectional combined low pressure difference diaphragm type one-way valve for pressure swing adsorption oxygen generator |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115241A (en) * | 2013-03-01 | 2013-05-22 | 丹阳市巨贸康健器材有限公司 | Molecular sieve oxygenator and oxygen storage tank thereof |
| CN114321082A (en) * | 2021-12-24 | 2022-04-12 | 苏州赛泰克机械科技有限公司 | Hydraulic cylinder with high buffer performance |
-
2010
- 2010-07-23 CN CN2010202729174U patent/CN201810832U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115241A (en) * | 2013-03-01 | 2013-05-22 | 丹阳市巨贸康健器材有限公司 | Molecular sieve oxygenator and oxygen storage tank thereof |
| CN114321082A (en) * | 2021-12-24 | 2022-04-12 | 苏州赛泰克机械科技有限公司 | Hydraulic cylinder with high buffer performance |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110427 Termination date: 20130723 |