CN2065269U - New-type reliable balanced valve - Google Patents
New-type reliable balanced valve Download PDFInfo
- Publication number
- CN2065269U CN2065269U CN 89217243 CN89217243U CN2065269U CN 2065269 U CN2065269 U CN 2065269U CN 89217243 CN89217243 CN 89217243 CN 89217243 U CN89217243 U CN 89217243U CN 2065269 U CN2065269 U CN 2065269U
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- China
- Prior art keywords
- negative pressure
- sealing
- pressure chamber
- valve
- hand member
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- Details Of Valves (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The utility model discloses a novelreliable balanced valve which is used to control the work of various differential pressure transducers. The structure of the type reliable balanced valve is that an integral type valve body is provided with 4 positive and negative pressure tube joints; a hand wheel and a valve rod drive the sequence switches of a positive pressure chamber, a negative pressure chamber, and a balance chamber, complete the ordinary operation of a three valve set, or a two value set. Multistage sealing mode formed by flexibility and rigidity is adopted; preventing the leakage frequently happened to a general balance valve, and ensuring the long term and reliable operation of a differential pressure transducer.
Description
The utility model belongs to the machinery valve technical field, is used to control all kinds of differential-pressure instrumentation inputs (opening) or stops the highly reliable equilibrium valve that (pass) moved.
Be the input of controlling all kinds of differential-pressure instrumentations or out of service, domestic a large amount of use three valve groups or two valve groups are used as equilibrium valve at present.But to conscientiously operate in strict accordance with certain programmed sequence of operations both hands, careless slightly, just might form unidirectional being stressed and damage the bellows of differential-pressure instrumentation; And this class valve exist possible leakage point that nearly ten places are arranged these are many, especially rotary valve rod with the leakage between the valve stem packing the most very, passing hole very little (φ 3mm) again, so use unreliablely, operating life is very short.
For this reason, domestic the patent of invention notification number is arranged is that the one hand wheel four-way check valve input of GG86104560 is on probation, can address the leakage concern preferably, uses also very convenient.When but this valve is not still considered long-term the use, after the skimming wear because of valve rod and stuffing box packing, cause differential-pressure instrumentation work undesired from the valve rod leakage; The passing hole of this valve very little (φ 3mm) again is still existence for the dirt obstructing problem of transmission medium.External valve is not taken measures to the leakage at valve rod place yet, only is that the people is leak stopping.
The purpose of this utility model provides a kind of improved highly reliable equilibrium valve, and it can prevent effectively that transmission medium from leaking from the valve rod of wearing and tearing, reduces dirt and blocks latus rectum, and guarantee that in use differential-pressure instrumentation works reliably and with long-term.
The purpose of this utility model is achieved in that with rigidity and the flexible method that combines and prevents internal leakage, then adopts multi-stage sealed method to improve unfailing performance to valve rod.
Fig. 1 is according to a kind of novel highly reliable equilibrium valve sectional drawing that the utility model proposes.Be run-stopping status (positive and negative pressure reduction chamber is closed) this moment.
Wherein: sealing moving part (15) spring (16) balance cylinder sealing quiet (17) pad (18) flexible seal ring (19) flexible seal ring (20) plemum sealing moving part (21) valve body (22) " O " shape rubber seal (23) lower cover (24) card assembly (25) plemum (26) balance cylinder (27) negative pressure chamber of (1) nut (2) pad (3) handwheel (4) valve rod (5) upper press cover (6) nut (7) valve stem packing (8) " O " shape rubber seal (9) valve body pad (10) " O " shape rubber seal (11) negative pressure chamber's locking nut (12) flexible seal ring (13) pad (14) negative pressure chamber
This valve is operated by a handwheel (3), its structure is with in the valve body of 4 positive and negative pressure pipe joints (21), be divided into plemum (25), (27) three chambers in balance cylinder (26) and negative pressure chamber with balance cylinder's sealing quiet (16), plemum sealing moving part (20) is housed in plemum (25), the outer garden of its right-hand member is connect mutually by the guide ledges of quiet (16) left end of gathering sill homostasis chamber sealing, flexible seal ring (18) is loaded on the left side of balance cylinder's sealing quiet (16), and flexible seal ring (19) is bumped on the right side of valve body (21) inner chamber; Valve rod (4) runs through negative pressure chamber (27), balance cylinder (26) and plemum (25), its left end seals moving part (20) by screw thread with plemum and links, the intermediate step left end is 30 °～45 ° chamferings, between its right-hand member and negative pressure chamber sealing moving part (14) left side " O " shape rubber seal (8) is installed; The right-hand member of negative pressure chamber's sealing moving part (14) is interior spacing by the groove that card assembly (24) snaps in valve rod (4), and the balance cylinder seals quiet (16) and negative pressure chamber seals between the moving part (14) and spring (15) is compressed in; Flexible seal ring (12), " O " shape rubber seal (10) are installed on respectively sealed negative-pressure chamber (27) in the left and right end groove of negative pressure chamber's sealing moving part (14); " O " shape rubber seal (22) is positioned at sealed valve stem (4) between card assembly (24) and negative pressure chamber's locking nut (11) inner chamber, " O " shape rubber seal (8) is installed in the right-hand member of negative pressure chamber's locking nut (11) sealed valve stem (4) in the hole near lower cover (23), nut (6) compresses upper press cover (5) makes valve stem packing (7) in the low order end sealing of valve rod (4), and sealing whole valve body (21) by negative pressure chamber's locking nut (11) at last becomes reliable balanced valve.
Plemum sealing moving part (20) of the present utility model, its left and right end face respectively has a collar flange, and there are 2～4 direction recess in outer garden; Quiet (16) of sealing, balance cylinder of the present utility model, its left side End is 2～4 guide ledges, and left side, inner hole is installed flexible seal ring (18) and formed balance cylinder's potted line, and inner hole right-hand member is that the mechanical seal of valve rod (4) is spacing; Negative pressure chamber of the present utility model locking nut (11), its left end has a collar flange; Middle four cross through hole are the negative pressure latus rectum; The design runlength of valve rod of the present utility model (4) equal the stroke of plemum sealing moving part (20) and be limited in balance cylinder's sealing quiet (16) in the hole right-hand member.
The utility model is conceived to the leakage problem that the wearing and tearing after long-term frequent use of valve rod cause.So model machine is experiment like this: (when being equivalent to serious wear) strengthened in valve stem packing (7) hole, lining, come sealed valve stem (4) near " O " shape rubber ring (8), (22), (10), when valve was applied relevant pressure, the valve rod place did not have leakage and is as the criterion.Test and try out and all prove the multi-stage sealed intended purposes that reached.If replace old-fashioned equilibrium valve with high reliability of the present utility model, will reduce the maintenance expenses of millions of units every year to domestic ten hundreds of differential-pressure instrumentation, will bring bigger benefit to the energy measurement work of each producer so.
Describe details and working condition in detail according to Fig. 1 below according to the concrete equilibrium valve that the utility model proposes.Fig. 1 now is run-stopping status (positive and negative pressure reduction chamber is closed)."+", "-" are labeled as positive and negative pressure reduction, the direction of arrow is represented positive and negative pressure reduction trend, "+", "-" input pipe joint connect the positive and negative pressure side of throttle element (pull as the hole etc.), and "+", "-" output terminal pipe joint connect "+", "-" end of differential-pressure instrumentation bellows.
When clockwise direction rotary valve rod (3), because the elastic force effect of spring (15), motionless and valve rod (4) rotation of negative pressure chamber sealing moving part (14), then plemum sealing moving part (20) is under the effect of right-handed thread, disengaging flexible seal ring (19) moves to it along the guide ledges of balance cylinder's sealing quiet (16), at this moment, positive pressure is by plemum (25), and balance cylinder (26) are added in two ends, differential-pressure instrumentation positive and negative pressure reduction chamber simultaneously and form isopiestic state.Continuation rotation hand wheel (3), valve rod (4) then plemum sealing moving part (20) are pressed on upward sealing and balancing chamber (26) of flexible seal ring (18) at last; Then valve rod (4) is under the effect of card assembly (24) for rotation hand wheel (3) again, and drive negative pressure chamber sealing moving part (14), flexible seal ring (12), " O " shape rubber seal (8) pressure spring (15) break away from negative pressure chamber's locking nut (11); " O " shape rubber seal (10) is still at negative pressure chamber's locking nut (11) inner chamber hydrodynamic reciprocating sealing, and valve rod (4) left end screw thread screws in plemum sealing moving part (20) simultaneously, then negative pressure chamber (27) is open-minded, up to the step left side of valve rod (4) move on to the mechanical seal of balance cylinder sealing quiet (16) spacing till.Differential-pressure instrumentation put into operation and finished this moment.
When counterclockwise rotation starts to take turns (3), then valve rod (4) seals negative pressure chamber on the potted line that moving part (14), flexible seal ring (12) be pressed in negative pressure chamber's locking nut (11) and seals negative pressure chamber (27) withdrawing from plemum sealing moving part (20) under the tension force of spring (15), continuation rotation hand wheel (3) then valve rod (4) makes plemum sealing moving part (20) break away from flexible seal ring (18), plemum this moment (25) communicates with balance cylinder (26), and the differential-pressure instrumentation two ends form isopiestic state again; Again rotation hand wheel (3) then valve rod (4) make plemum sealing moving part (20) be pressed in flexible seal ring (19) sealing plemum (25), out of service finishing.
In the course of the work, " O " shape rubber seal (8), (22), (10) keep multi-stage sealed form to valve rod (4) all the time.
Claims (6)
1, a kind of highly reliable equilibrium valve of controlling all kinds of differential-pressure instrumentation work, this valve is by a handwheel (3) operation, it is characterized in that being divided into plemum (25), balance cylinder (26) and negative pressure chamber (27) with balance cylinder's sealing quiet (16) in the whole valve body (21) that has 4 positive and negative pressure pipe joints; Plemum sealing moving part (20) is housed in plemum (25), and the outer garden of its right-hand member connects by 2-4 groove homostasis chamber quiet (16) left side 2-4 boss of sealing; Flexible seal ring (18) is set in the groove of quiet (16) left side of balance cylinder sealing, and flexible seal ring (19) is set in the groove on valve body (21) the atrium right side; Valve rod (4) runs through negative pressure chamber (27), balance cylinder (26) and plemum (25), its left end by spiral marking connection plemum sealing moving part (20), the intermediate step left side is 30 ° of-45 ° of conical surface chamferings, between right-hand member and the negative pressure chamber's sealing moving part (14) " 0 " shape rubber seal (8) is installed; The interior spacing negative pressure chamber of groove that card assembly (24) is stuck in valve rod (4) seals the axial displacement of moving part (14) and seals moving part (14) pressure spring (15) between quiet (16) right-hand member of balance cylinder's sealing by negative pressure chamber; " 0 " shape rubber seal (22) near card assembly (24) is housed in the negative pressure chamber (27), and by the flexible seal ring (12) and the sealing of " 0 " the shape rubber ring (10) in the right-hand member groove negative pressure chamber (27) that are loaded in negative pressure chamber's sealing moving part (14) left end groove; " 0 " rubber ring (8) is installed in negative pressure chamber's locking nut (11) right-hand member sealed valve stem (4) between the hole and lower cover (23), becomes highly reliable equilibrium valve by negative pressure chamber's locking nut (11) sealing whole valve body (21) at last.
2, highly reliable equilibrium valve according to claim 1 is characterized in that the left and right end face of plemum sealing moving part (20) right-hand member respectively has a collar flange, and its section crosses for the R=1-1.25 garden slips over;
3, highly reliable equilibrium valve according to claim 1 is characterized in that balance cylinder's quiet (16) left end of sealing has 2-4 guide ledges, and right-hand member has 4 boss, and there is an annular recess left side, and hole, lining right-hand member is 0.5 * 30 ° of chamfering.
4, highly reliable equilibrium valve according to claim 1, it is characterized in that card assembly (24) by socket and inserted sheet two-part form and riveting in the groove of valve rod (4) right-hand member.
5, highly reliable equilibrium valve according to claim 1, the design runlength that it is characterized in that valve rod (4) equal the stroke of plemum sealing moving part (20) and be limited in balance cylinder's sealing quiet (16) in the hole right-hand member.
6, highly reliable equilibrium valve according to claim 1 is characterized in that there is a collar flange negative pressure chamber's locking nut (11) left side, and its section is that R=1～1.25 gardens slip over and cross; Middle 4 cross through hole are the negative pressure latus rectum, and by the last airtight whole valve body of negative pressure chamber's locking nut (11) (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89217243 CN2065269U (en) | 1989-09-14 | 1989-09-14 | New-type reliable balanced valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89217243 CN2065269U (en) | 1989-09-14 | 1989-09-14 | New-type reliable balanced valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2065269U true CN2065269U (en) | 1990-11-07 |
Family
ID=4872532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89217243 Withdrawn CN2065269U (en) | 1989-09-14 | 1989-09-14 | New-type reliable balanced valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2065269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674039A (en) * | 2012-05-28 | 2012-09-19 | 龙岩烟草工业有限责任公司 | Device and method for controlling negative pressure air suction |
-
1989
- 1989-09-14 CN CN 89217243 patent/CN2065269U/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102674039A (en) * | 2012-05-28 | 2012-09-19 | 龙岩烟草工业有限责任公司 | Device and method for controlling negative pressure air suction |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |