CN105299303B - A kind of high pressure blowdown pneumatic operated valve - Google Patents
A kind of high pressure blowdown pneumatic operated valve Download PDFInfo
- Publication number
- CN105299303B CN105299303B CN201510738767.9A CN201510738767A CN105299303B CN 105299303 B CN105299303 B CN 105299303B CN 201510738767 A CN201510738767 A CN 201510738767A CN 105299303 B CN105299303 B CN 105299303B
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- China
- Prior art keywords
- spool
- valve
- sealing
- pneumatic operated
- valve seat
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/126—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a diaphragm, bellows, or the like
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
- Multiple-Way Valves (AREA)
Abstract
The present invention discloses a kind of high pressure blowdown pneumatic operated valve, including spool, valve seat and valve body, and the spool is set as diaphragm type structure that is across rubber diaphragm and being linked together by locking nut and rubber diaphragm；The spool is equipped with y-shaped ring, realizes the frictional resistance of sealing ring when the while of being sealed between spool and valve body can be effectively controlled valve core movement；The valve base sealing position for being adapted with spool lower end sealing surface and constituting sealing cooperation is equipped on valve seat；The peripheral edge portion at the spool lower end sealing surface position is set as the spherical face of spool, and the valve base sealing position coordinates the spherical face of spool to constitute globally tangential once sealing by the oblique guide surface of valve seat；The middle section at the spool lower end sealing surface position is set as plasticity spool filling block, and the valve base sealing position coordinates spool filling block to constitute the secondary seal on spool stroke direction by valve seat protruding block.The present invention can be obviously improved the sealing performance of pneumatic operated valve and effectively to solve the problems, such as that pneumatic operated valve is opened unsmooth.
Description
Technical field
The invention belongs to blowdown valve technical fields, and in particular to a kind of high pressure blowdown pneumatic operated valve.
Background technology
High pressure blowdown pneumatic operated valve is applied in the drainage of high pressure compressor, passes through the low pressure control being applied on pneumatic operated valve
The discharge of gas processed controls the discharge of high-pressure air-water oil mixture to realize.In the prior art, as shown in Figure 1, pneumatic operated valve lower end connects
High pressure blowdown gas is connect, upper end connects low voltage control gas, and two bursts of air pressures may act on spool, and spool upper end compression area is big, under
Hold compression area small；Spool is sealed with valve interior wall by 0 type circle together, and spool is with valve body intermediate bulkhead also by O-shaped together
Circle sealing；When not needing blowdown, pneumatic operated valve upper end is passed through low voltage control gas, this makes the pressure bigger that spool upper end is subject to,
Spool moves down, and the cone of spool lower end contacts realization sealing with the high pressure pore passageway line of lower valve base；When needing blowdown,
Pneumatic operated valve upper end is by low voltage control gas discharge, upper end no pressure and spool by high pressure of the lower end from pore passageway to upwards
Mobile, the high pressure blowdown of lower end is so incensed that with discharge.
Although pneumatic operated valve be used for high pressure compressor drainage, compare directly using high-pressure solenoid valve blowdown mode for
More reliable, cost is lower, but frequently appears in actual application when do not need blowdown, and spool cannot be completely close
Envelope, there are leakage phenomenons, directly reduce pressure at expulsion at different levels and final volume flow；And it has also appeared and is needing blowdown
When, spool cannot be opened by design or opening degree is inadequate, causes the problem that blowdown is unsmooth.
Therefore, those skilled in the art it is urgent to provide it is a kind of can be obviously improved sealing performance and effectively solve pneumatic operated valve beat
Open unsmooth high pressure blowdown pneumatic operated valve.
Invention content
Against the above deficiency, sealing performance and effectively solution pneumatic operated valve opening can be obviously improved the present invention provides a kind of
Unsmooth high pressure blowdown pneumatic operated valve.
To achieve the above object, present invention employs following technical schemes：
A kind of high pressure blowdown pneumatic operated valve, including spool, valve seat and valve body, the spool pass through valve seat and are constituted with valve seat and slided
Dynamic cooperation, the spool are set as diaphragm type knot that is across rubber diaphragm and being linked together by locking nut and rubber diaphragm
Structure；The spool is being equipped with y-shaped ring on the matched sliding surface of valve body；Valve seat is equipped with and spool lower end sealing surface
It is adapted the valve base sealing position for constituting sealing cooperation, the high pressure blowdown import of pneumatic operated valve is arranged at valve base sealing position.
Preferably, spool lower end sealing surface is contacted by outer rim respectively with valve base sealing position, end contacts accordingly
Ground respectively constitutes once sealing, secondary seal.
Preferably, the peripheral edge portion at the spool lower end sealing surface position is set as the spherical face of spool, the valve base sealing portion
Position is provided with the oblique guide surface of ring-shaped distributed valve seat, and the high pressure blowdown import of pneumatic operated valve is arranged in the oblique guide surface of valve seat
Portion；The valve base sealing position coordinates the spherical face of spool to constitute globally tangential once sealing by the oblique guide surface of valve seat.
As a preferred embodiment of the present invention, the end of spool lower end sealing surface is set as spool filling block, described
Valve base sealing position is provided with valve seat protruding block, the high pressure blowdown import setting of pneumatic operated valve on the inside of the oblique guide surface of the valve seat
On the valve seat protruding block；The valve base sealing position coordinates spool filling block to constitute along spool stroke by valve seat protruding block
Secondary seal on direction.
As another preferred embodiment of the present invention, the end of spool lower end sealing surface is provided with protrusion, described
Protrusion blocks the high pressure blowdown entrance formation secondary seal in pneumatic operated valve.
Preferably, the spool filling block is set as polytetrafluoroethylene (PTFE) filling block.
The beneficial effects of the present invention are：
1), in the prior art, sealing surface position in spool lower end is cone, causes spool lower sealing surface area insufficient, this
Spool lower end sealing surface position is changed to spherical face by invention in side part, is directly increased the sealing surface area of spool, is made valve
Core be bonded with valve seat it is closer, while when structure of spherical surface enables spool guiding deviation occur also there is certain self-recision
Power improves the leakproofness of sealing surface, to promote its sealing performance；High pressure seat sealing position is equipped with and spool accordingly
Lower end spherical surface size match there is certain inclined-plane for being oriented to length so that guide-localization more holds when spool is moved to valve seat
Easily, the possibility for reducing sealing surface dislocation, guarantee is provided for the reliability service of pneumatic operated valve.
Spool lower end sealing surface fits composition once by the outer rim of its dome shape with the inclined-plane on valve base sealing position
Sealing, sealing effect can also be further increased between spool lower end sealing surface and valve base sealing position by secondary seal.
The secondary seal can be following form：The end middle section of spool lower end sealing surface is set as filling agllutination
Structure realizes that the material hardness for being spatially separating i.e. sealing position is small, and the material hardness at the other pressure-bearing positions of spool is big；It is corresponding high
The seal face of pressure valve seat is equipped with protruding block so that the squish area smaller of extruding polytetrafluoroethylene (PTFE) filling block, extruding force bigger,
Sealing effect is more preferable.
The secondary seal can also be following form：The end of spool lower end sealing surface is provided with protrusion, it is described
Protrusion closure can form secondary seal in the high pressure blowdown entrance of pneumatic operated valve.
Certainly, as long as the end of spool lower end sealing surface can block the high pressure blowdown entrance in pneumatic operated valve, i.e., all
Secondary seal can be formed.
2), spool is changed to diaphragm type structure by the present invention, spool is passed through rubber diaphragm, the locking nut locking at the back side will
Diaphragm and spool are connected, and when control low pressure gas is passed through, it is downward that diaphragm compression generates downward plastic deformation band movable valve plug
Movement squeezes high pressure seat and realizes sealing, to make entire spool action process avoid the resistance that friction generates, avoids and draws
Spool pressing force is played, the leakproofness of pneumatic operated valve is increased, effectively improves its sealing performance.
3), the present invention in spool by y-shaped ring with valve body contact to realize that condition detaches, i.e., when no pressure or pressure
When power is low, the degree of sealing ring contact squeeze valve interior wall is small, but when there is pressure sealing ring contact squeeze valve interior wall journey
Degree increases therewith.Specifically, the section of y-shaped ring is Y-shaped, belong to lip-type packing.When without being pressurized, only because of the change of procheilon
Shape and the contact for generating very little；When pressure rise, the distribution form and size of contact change, lip by
Circumferential compression, lip and sealing surface cooperation are closer, so better tightness, and sealing reliability is also more excellent.
4), pneumatic valve configurations flexibility of the present invention is more preferable, is more easy to I＆ M, and sealing stability is greatly improved, improved
The work of the performance boost of pneumatic operated valve and the reduction of frequency of maintenance for the promotion of the reliability and operational efficiency of entire compressor afterwards
With apparent, direct maintenance cost is greatly reduced.
Description of the drawings
Fig. 1 is the structure schematic diagram of pneumatic operated valve in the prior art.
Fig. 2,3,4 are the structure schematic diagram of pneumatic operated valve of the present invention.
Fig. 5 is the portions the A enlarged drawing of Fig. 4.
The meaning of label symbol is as follows in figure：
The spherical face 101- spools filling block 102- protrusions of 10- spool 100- spools
11- rubber diaphragm 12-Y shape sealing rings
The oblique guide surface 201- valve seat protruding blocks of 20- valve seat 200- valve seats
30- valve bodies
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, is clearly and completely retouched to the technical solution in the present invention
It states.Based on the embodiments of the present invention, obtained by those of ordinary skill in the art without making creative efforts
Every other embodiment, shall fall within the protection scope of the present invention.
A kind of high pressure blowdown pneumatic operated valve, including spool 10, valve seat 20 and valve body 30, the spool 10 are set as across rubber membrane
Piece 11 and the diaphragm type structure that is linked together by locking nut and rubber diaphragm 11；Pacify on the lateral surface of the spool 10
Equipped with y-shaped ring 12, sealing ring when can be effectively controlled valve core movement while realizing the sealing between spool and valve body 30
Frictional resistance；The valve base sealing position for being adapted with 10 lower end sealing surface of spool and constituting sealing cooperation is equipped on valve seat 20.
Specifically, the section of y-shaped ring 12 is Y-shaped, when no pressure or low pressure, in 12 contact squeeze valve body 30 of y-shaped ring
The degree of wall is small, but the degree of 12 contact squeeze valve body of y-shaped ring, 30 inner wall increases therewith when there is pressure.
10 lower end sealing surface position of the spool and valve base sealing position are contacted correspondingly by outer rim contact, centre respectively
Once sealing, secondary seal are constituted, specific sealing means are as follows：
Embodiment 1
As shown in Fig. 2, the peripheral edge portion at 10 lower end sealing surface position of the spool is set as the spherical face 100 of spool, the valve
Seat sealing position coordinates the spherical face of spool 100 to constitute tangential once sealing by the oblique guide surface 200 of valve seat；Under the spool 10
The middle section at end sealing surface position is set as polytetrafluoroethylene (PTFE) spool filling block 101, and the valve base sealing position is convex by valve seat
Bittiness 201 cooperation spool filling block 101 constitutes secondary seal of the pneumatic operated valve in 10 stroke directions of spool, valve when secondary seal
Core filling block 101 blocks the high pressure blowdown entrance in the pneumatic operated valve on valve seat protruding block 201 in sealing；That is spool 10
Lower end sealing surface position is set as the split structure in spool spherical face 100 and spool filling block 101, and valve base sealing position is set as distinguishing
Coordinate the split structure of the valve seat oblique guide surface 200 and valve seat protruding block 201 of the spherical face 100 of spool and spool filling block 101.
Embodiment 2
As shown in figure 3,10 lower end sealing surface position of the spool is integrally set as the spherical face 100 of spool, the valve base sealing
Position coordinates the spherical face of spool 100 to constitute tangential once sealing by the oblique guide surface 200 of valve seat；Match at the valve base sealing position
It closes the spherical top surface of spool and tangentially contacts the secondary seal constituted in 10 stroke directions of spool.
In the above-described embodiments, the interior chamber size that the oblique guide surface of the valve seat 200 surrounds is more than the ruler in the spherical face of spool 100
It is very little so that the oblique guide surface of valve seat 200 can accommodate 10 lower end sealing surface position of spool completely.
Embodiment 3
As shown in Figure 4,5, relatively, difference lies in embodiments 3 for the structure in embodiment 3 and the structure in embodiment 2
In the head of 10 lower end sealing surface of spool be arranged to convex, the head of this convex is set as being plugged in pneumatic operated valve just
In high pressure blowdown import, to improve sealing effect compared to the structure in embodiment 2.
The operation principle of pneumatic operated valve of the present invention is further described in detail below in conjunction with the accompanying drawings.
High pressure gas p2 enters from the bottom of pneumatic operated valve, acts on the lower part of spool 10；Low voltage control gas p1 is from pneumatic
The top of valve enters, and acts on the top of spool 10.During compressor gas transmission, the effect of p2 and p1 make spool 10 and valve seat
Sealing state is between 20；When low-pressure stage solenoid valve blowdown, p1 is reduced suddenly, and spool 10 takes off under the action of high pressure gas
It is discharged from valve seat 20；P1 and p2 is hurried to be down to blowdown back pressure pb1 and pb2, continues for some time, low-pressure stage (control gas) row
Dirty solenoid valve is closed, and p1 increases suddenly, causes spool 10 under the action of p1, is moved to valve seat 20, until the two realization is complete
Sealing；P2 also rapid increases simultaneously, in a short period of time, p1 and p2 rise to service pressure again, and at this moment compressor is again
In normal gas transmission state.
Claims (2)
1. a kind of high pressure blowdown pneumatic operated valve, including spool（10）, valve seat（20）And valve body（30）, the spool（10）Across valve body
（30）And and valve body（30）Composition is slidably matched, it is characterised in that：The spool（10）It is set as across rubber diaphragm（11）, simultaneously
Pass through locking nut and rubber diaphragm（11）The diaphragm type structure being linked together；The spool（10）With valve body（30）It matches
Sliding surface on y-shaped ring is installed（12）；Valve seat（20）It is equipped with and spool（10）It is close that lower end sealing surface is adapted composition
The valve base sealing position of cooperation is sealed, the high pressure blowdown import of pneumatic operated valve is arranged at valve base sealing position；
The spool（10）Lower end sealing surface is contacted by outer rim respectively with valve base sealing position, structure is correspondingly distinguished in end contact
At once sealing, secondary seal；
The spool（10）The peripheral edge portion at lower end sealing surface position is set as the spherical face of spool（100）, the valve base sealing position
It is provided with the oblique guide surface of ring-shaped distributed valve seat（200）；The valve base sealing position passes through the oblique guide surface of valve seat（200）Cooperation
The spherical face of spool（100）Constitute globally tangential once sealing；
The spool（10）The end of lower end sealing surface is set as spool filling block（101）, the valve base sealing position is in the valve
The oblique guide surface of seat（200）Inside be provided with valve seat protruding block（201）, the high pressure blowdown import setting of pneumatic operated valve is in the valve seat
Protruding block（201）On；The valve base sealing position passes through valve seat protruding block（201）Coordinate spool filling block（101）It constitutes along valve
Core（10）Secondary seal in stroke directions.
2. a kind of high pressure blowdown pneumatic operated valve according to claim 1, it is characterised in that：The spool filling block（101）If
For polytetrafluoroethylene (PTFE) filling block.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510738767.9A CN105299303B (en) | 2015-11-02 | 2015-11-02 | A kind of high pressure blowdown pneumatic operated valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510738767.9A CN105299303B (en) | 2015-11-02 | 2015-11-02 | A kind of high pressure blowdown pneumatic operated valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105299303A CN105299303A (en) | 2016-02-03 |
| CN105299303B true CN105299303B (en) | 2018-09-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510738767.9A Active CN105299303B (en) | 2015-11-02 | 2015-11-02 | A kind of high pressure blowdown pneumatic operated valve |
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| CN (1) | CN105299303B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105736781A (en) * | 2016-04-01 | 2016-07-06 | 上海澳升清洁科技有限公司 | Pressure reduction throttling valve and application method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2616759Y (en) * | 2003-04-22 | 2004-05-19 | 尤金福 | Light wear-resistant plunger valve |
| DE102005016387B3 (en) * | 2005-04-09 | 2006-09-07 | Apv Rosista Gmbh | Membrane valve used in pneumatically controlled pressure control valves for maintaining constant pressures comprises a stationary plate detachedly positioned in a valve housing and formed as a radial tangent guide in its operating position |
| CN201651389U (en) * | 2009-09-01 | 2010-11-24 | 江苏金正自控阀门有限公司 | Dual-sealing valve seat ball valve |
| WO2011147078A1 (en) * | 2010-05-25 | 2011-12-01 | Emerson Process Management (Tianjin) Valve Co., Ltd. | Valve trim apparatus having cavity to receive contaminates from sealing surface |
| CN203477326U (en) * | 2013-06-28 | 2014-03-12 | 重庆拓源给排水设备有限公司 | Diaphragm mud valve |
| CN103671986A (en) * | 2013-12-02 | 2014-03-26 | 东正科技有限公司 | Back pressure valve |
| CN204704462U (en) * | 2015-05-29 | 2015-10-14 | 徐州阿卡控制阀门有限公司 | A kind of pneumatic diaphragn actuating mechanism |
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| CN105299303A (en) | 2016-02-03 |
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Address after: 230031 No. 888 Changjiang West Road, Shushan District, Hefei, Anhui. Applicant after: Hefei General Machinery Research Institute Co., Ltd. Address before: 230031 No. 888 Changjiang West Road, Shushan District, Hefei, Anhui. Applicant before: Hefei Universal Machinery Inst. |
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