CN104806810A - Straight guide ring piston sealing structure for regulating valve - Google Patents
Straight guide ring piston sealing structure for regulating valve Download PDFInfo
- Publication number
- CN104806810A CN104806810A CN201410038051.3A CN201410038051A CN104806810A CN 104806810 A CN104806810 A CN 104806810A CN 201410038051 A CN201410038051 A CN 201410038051A CN 104806810 A CN104806810 A CN 104806810A
- Authority
- CN
- China
- Prior art keywords
- piston
- guide ring
- ring
- cylinder
- sealing structure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/08—Characterised by the construction of the motor unit
- F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Sealing Devices (AREA)
Abstract
The invention relates to a straight guide ring piston sealing structure for a regulating valve. The straight guide ring piston sealing structure for the regulating valve is arranged in a cylinder and composed of a piston body, a guide ring and a sealing ring, the piston body is arranged in the cylinder in a sleeve mode, a piston guide groove and a piston sealing groove are opened in the outer surface of the piston body, the inner side of the guide ring is inserted in the piston guide groove, the outer side is closely connected with the inner wall of the cylinder, the guide ring plays roles of supporting and guiding when the piston body moves, the inner side of the sealing ring is embedded in the piston sealing groove, the outer side is closely connected with the inner wall of the cylinder, and the sealing ring plays a role of sealing the piston body with the inner wall of the cylinder. Compared with the prior art, the spring expansion ring type sealing structure is changed into the straight guide ring sealing ring type, because the improved device does not have an elastic element, the unnecessary valve fault due to the failure of the elastic element can be completely eliminated. The straight guide ring piston sealing structure for the regulating valve has advantages of simple structure, long service life and the like.
Description
Technical field
The present invention relates to a kind of piston sealing structure, especially relate to a kind of straight-through guide ring piston sealing structure for modulating valve.
Background technique
In regulating-valve actuator, steam-cylinder piston is core component, and wherein the effect quality of cylinder seal directly affect modulating valve can regular event.The Sealing used in pneumatic actuator common is at present circumferential ring expander, utilizes the elasticity of spring, and steam-cylinder piston is swollen outward, and props up cylinder wall, makes not collaborate mutually before and after cylinder, forms seal action.But because spring is elastic element, use for a long time spring slowly to follow the string, and spring get rusty easily, ultimate failure and make valve cisco unity malfunction.And if run well valve break down, device will be caused to stop.
Summary of the invention
Object of the present invention is exactly provide to overcome defect that above-mentioned prior art exists that a kind of structure is simple, the straight-through guide ring piston sealing structure for modulating valve of long service life.
Object of the present invention can be achieved through the following technical solutions:
A kind of straight-through guide ring piston sealing structure for modulating valve, be located in cylinder, by piston only, guide ring and seal ring form, described piston only is set in cylinder, the outer surface of described piston only offers piston guide groove and piston seal groove, the inner side of described guide ring is embedded in piston guide groove, outside is close to cylinder inner wall and is connected, support guide effect is played when piston only moves, the inner side of described seal ring is embedded in piston seal groove, outside is close to cylinder inner wall and is connected, play the effect that piston only and cylinder inner wall seal.
Described piston only is the cylindrical body processed by metal material.
Described guide ring is polytetrafluoroethylene ring.
Described seal ring is fluorine-containing rubber circle.
Described piston guide groove and piston seal groove are the full circumferences cell body being opened in piston only radial surface, and the cross section of cell body is rectangle.
The present invention is used for the straight-through guide ring piston sealing structure of modulating valve, promotes piston only Positive-Negative Action and moves, play the guiding role, act between piston only and cylinder inner wall by seal ring, make positive and negative cavity stroke seal action by guide ring by source of the gas.When positive cavity obtains bleed pressure, piston only is toward the motion of positive interaction direction, and when anti-cavity obtains bleed pressure, piston only, toward motion in the other direction, so just can realize the Push And Release of valve.
Compared with prior art, the sealing configuration of circumferential ring expander form is changed over the form of straight-through guide ring seal ring by the present invention, because modifying device is without elastic element, thoroughly can eliminates like this because elastic element lost efficacy and cause unnecessary failsafe valve.And the feature that piston only, guide ring and seal ring have the life-span long, so the steam-cylinder piston of circumferential ring expander form can be substituted completely, there is the advantages such as structure is simple, long service life.
Accompanying drawing explanation
Fig. 1 is the structural representation of comparative example medi-spring packing form sealing configuration;
Fig. 2 is main TV structure schematic diagram of the present invention;
Fig. 3 is side-looking structural representation of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
Comparative example
As shown in Figure 1, the outside of piston only 1 is provided with circumferential ring expander 2 and piston seal 3 to traditional circumferential ring expander form sealing configuration, utilizes the elasticity of spring, and steam-cylinder piston is swollen outward, and props up cylinder wall, makes not collaborate mutually before and after cylinder, forms seal action.But because spring is elastic element, use for a long time spring slowly to follow the string, and spring get rusty easily, ultimate failure and make valve cisco unity malfunction.And if run well valve break down, device will be caused to stop.
Embodiment
A kind of straight-through guide ring piston sealing structure for modulating valve, as Fig. 2, shown in Fig. 3, be located in cylinder, by piston only 1, guide ring 4 and seal ring 5 form, piston only 1 is set in cylinder, the outer surface of piston only 1 offers piston guide groove 11 and piston seal groove 12, the inner side of guide ring 4 is embedded in piston guide groove 11, outside is close to cylinder inner wall and is connected, support guide effect is played when piston only 1 moves, prevent piston only 1 move time discontinuity and with cylinder inner wall friction, the inner side of seal ring 5 is embedded in piston seal groove 12, outside is close to cylinder inner wall and is connected, play the effect that piston only 1 seals with cylinder inner wall, separate the cavity of stroke Positive-Negative Action.Piston guide groove 11 and piston seal groove 12 are the full circumferences cell body being opened in piston only 1 radial surface, and the cross section of cell body is rectangle.
Piston only 1 is the cylindrical body processed by metal material, and metal material can be aluminium, stainless steel or other metals, adopts aluminium to process in the present embodiment, and aluminium is comparatively light, easily processes.Guide ring 4 is polytetrafluoroethylene ring, and the life-span is long, corrosion-resistant, high temperature resistant.Seal ring 5 is fluorine-containing rubber circle, and the life-span is long, not yielding.
The present invention is used for straight-through guide ring 4 piston sealing structure of modulating valve, promotes piston only 1 Positive-Negative Action and moves, play the guiding role, acted between piston only 1 and cylinder inner wall by seal ring 5, make positive and negative cavity stroke seal action by guide ring 4 by source of the gas.When positive cavity obtains bleed pressure, piston only 1 is toward the motion of positive interaction direction, and when anti-cavity obtains bleed pressure, piston only 1, toward motion in the other direction, so just can realize the Push And Release of valve.
Claims (5)
1. the straight-through guide ring piston sealing structure for modulating valve, be located in cylinder, it is characterized in that, by piston only, guide ring and seal ring form, described piston only is set in cylinder, the outer surface of described piston only offers piston guide groove and piston seal groove, the inner side of described guide ring is embedded in piston guide groove, outside is close to cylinder inner wall and is connected, support guide effect is played when piston only moves, the inner side of described seal ring is embedded in piston seal groove, outside is close to cylinder inner wall and is connected, play the effect that piston only and cylinder inner wall seal.
2. a kind of straight-through guide ring piston sealing structure for modulating valve according to claim 1, it is characterized in that, described piston only is the cylindrical body processed by metal material.
3. a kind of straight-through guide ring piston sealing structure for modulating valve according to claim 1, it is characterized in that, described guide ring is polytetrafluoroethylene ring.
4. a kind of straight-through guide ring piston sealing structure for modulating valve according to claim 1, it is characterized in that, described seal ring is fluorine-containing rubber circle.
5. a kind of straight-through guide ring piston sealing structure for modulating valve according to claim 1, it is characterized in that, described piston guide groove and piston seal groove are the full circumferences cell body being opened in piston only radial surface, and the cross section of cell body is rectangle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038051.3A CN104806810A (en) | 2014-01-26 | 2014-01-26 | Straight guide ring piston sealing structure for regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410038051.3A CN104806810A (en) | 2014-01-26 | 2014-01-26 | Straight guide ring piston sealing structure for regulating valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104806810A true CN104806810A (en) | 2015-07-29 |
Family
ID=53691896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410038051.3A Pending CN104806810A (en) | 2014-01-26 | 2014-01-26 | Straight guide ring piston sealing structure for regulating valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104806810A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730243A (en) * | 2018-08-06 | 2018-11-02 | 苏州同大机械有限公司 | The pressurizing cylinder of blow moulding machine mould clamping device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644253A (en) * | 2008-08-05 | 2010-02-10 | 北京谊安医疗系统股份有限公司 | Piston sealing device |
| CN201834986U (en) * | 2010-11-05 | 2011-05-18 | 贵阳铝镁设计研究院 | Single-acting cylinder |
| CN102410277A (en) * | 2011-11-29 | 2012-04-11 | 徐州宇家医药科技有限公司 | Miniature cylinder |
| CN203223268U (en) * | 2013-02-05 | 2013-10-02 | 青岛智远汽车部件有限公司 | Double-valve-sheet-type exhaust brake valve |
-
2014
- 2014-01-26 CN CN201410038051.3A patent/CN104806810A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644253A (en) * | 2008-08-05 | 2010-02-10 | 北京谊安医疗系统股份有限公司 | Piston sealing device |
| CN201834986U (en) * | 2010-11-05 | 2011-05-18 | 贵阳铝镁设计研究院 | Single-acting cylinder |
| CN102410277A (en) * | 2011-11-29 | 2012-04-11 | 徐州宇家医药科技有限公司 | Miniature cylinder |
| CN203223268U (en) * | 2013-02-05 | 2013-10-02 | 青岛智远汽车部件有限公司 | Double-valve-sheet-type exhaust brake valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108730243A (en) * | 2018-08-06 | 2018-11-02 | 苏州同大机械有限公司 | The pressurizing cylinder of blow moulding machine mould clamping device |
| CN108730243B (en) * | 2018-08-06 | 2023-06-30 | 苏州同大机械有限公司 | Pressurized cylinder of mould closing device of blow molding machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150729 |
|
| RJ01 | Rejection of invention patent application after publication |