CN105485366A - PMSS ball valve seat - Google Patents
PMSS ball valve seat Download PDFInfo
- Publication number
- CN105485366A CN105485366A CN201610046123.8A CN201610046123A CN105485366A CN 105485366 A CN105485366 A CN 105485366A CN 201610046123 A CN201610046123 A CN 201610046123A CN 105485366 A CN105485366 A CN 105485366A
- Authority
- CN
- China
- Prior art keywords
- valve seat
- sealing
- shaped
- pmss
- valve
- 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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0673—Composite packings
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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
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Abstract
The invention discloses a PMSS ball valve seat. A sealing ring is arranged between a valve seat and a valve body, a T-shaped rubber ring and a metal sealing surface are arranged between the valve seat and a ball body, the metal sealing surface adopts ENP (electroless nickel plating), bead welding or spraying of cemented carbide and forms sealing after being ground with the ball body in a matched manner, a valve seat sealing surface of the valve seat is closely attached to the ball body under the action of a spring and medium pressure, the T-shaped ring deforms, the ball body is contacted with the metal sealing surface, and the role of the PMSS double-sealing valve seat is played. The service life of the valve seat is prolonged effectively, and the valve seat has the characteristics of corrosion resistance and impact resistance of metal sealing, has stability of rubber sealing, can be applied to complex working conditions and is free of maintenance for a long time.
Description
Technical field
The present invention relates to a kind of PMSS ball seat, be specifically related to the double-sealing valve seat that a kind of rubber seal adds metal sealing
Background technique
Ball valve is one of widely used valve, and chief component has, valve body, valve seat, spheroid, valve rod, Sealing etc.Its working principle is valve seat and ball seal, drives spheroid to rotate, to reach the effect of keying by valve rod.Ball valve sealing is reliable, and structure is simple, easy to maintenance, therefore widely uses in industries such as oil, chemical industry, metallurgy.
Existing ball seat mainly contains 2 kinds of sealing means
1. flexible sealing type valve seat, adopts the Sealing such as rubber, plastics inserted valve seat, forms sealing pair with spheroid.Be subject to the impact of temperature, pressure, medium, at the bottom of the life-span, maintenance cost is high.
2. hard sealed type valve seat, adopts sealing surface of seat chemical nickel phosphorus plating (ENP), built-up welding or sprays various cemented carbide, forming sealing pair by match grinding and spheroid.This structure is higher to seal request, and cost is high, is difficult to adapt in the occasion that some sealing class requirements are higher.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, the PMSS double-sealing valve seat providing a kind of soft and hard seal to combine.
The present invention for achieving the above object, reaches desirable technique effect, is achieved through the following technical solutions.
A kind of ball seat, by between valve seat (2) and valve body (1), between valve seat (2) and spheroid (3), Sealing is set, form the enclosed construction of sealing, rubber o-ring (2.4) can be set between valve seat (2) valve body (3), plastic ring, the stuffing box packing such as graphite circle form sealing, the T-shaped circle of one rubber (2.1) is set between valve seat (2) and spheroid (3) and metallic sealing section (2.2) forms double sealing structure, rubber seal face is positioned at metallic sealing section top, and rubber seal face is higher than metallic sealing section, form an elasticity step, by seating spring pretension and medium thrust, make rubber compressive strain, spheroid is close to rubber seal face and metallic sealing section, play the effect of double-sealing PMSS valve seat.
The T-shaped circle hardness of described rubber seal reaches more than shore A90, is locked in valve seat vallecular cavity, prevents pressure from going out by collar (2.3).
Described metallic sealing section (2.2) adopts chemical nickel phosphorus plating, built-up welding or coated with hard alloy, and with spheroid match grinding, roughness is less than or equal to 0.2, and play metal sealing effect, metallic sealing section has wear-resistant, corrosion resistant feature.
The present invention adopts the beneficial effect of such scheme to be:
The PMSS double seal valve stand structure combined by soft and hard seal, is sealed the impurity filtered out in medium, and bears the erosion of high pressure by first layer metal, protection rubber ring.The second sealing of rubber simultaneously, under the protection of metal sealing, can be higher at pressure, and play good sealing under the operating mode of impurity, give full play to the superiority of rubber sealing, evade metal sealing requires a lower seal difficulty difficult problem in high sealing.Double sealing structure, compensates mutually, and sealing is stable, serves non-maintaining effect.
Accompanying drawing explanation
Fig. 1. invention assembly schematic diagram
Fig. 2 .PMSS valve seat partial enlarged drawing
Shown by reference numeral illustrates: 1. valve body; 2. valve seat; 3. spheroid; 2.1.T type rubber ring; 2.2 metallic sealing section; 2.3. collar; 2.4.O type rubber ring; 2.5. spring.
Embodiment
Below with reference to the accompanying drawings in conjunction with the embodiments, the present invention is described in detail.
See Fig. 1, shown in Fig. 2, a kind of valve seat of fixed ball valve (2) is arranged and between valve body (1) and spheroid (3), a closed interval is formed by seal ring, with valve seal, rubber o-ring (2.4), plastic seal ring, carbon seal ring can be selected according to operating mode.With ball seal, adopt the double sealing structure that T-shaped rubber ring (2.1) and metallic sealing section (2.2) seal simultaneously.
Metallic sealing section adopts built-up welding and coated with hard alloy, and its surface spheroid match grinding the most finally, roughness less than 0.2, ensures its metal sealing.
Rubber seal adopts T-type structure, ensure that the dimensional stability of rubber, is fixed in valve seat groove by collar (2.3), and by calculating, the method for test determines its projecting height, and rubber ring hardness need reach more than shore A90.
Its working principle of the present invention and process
Fig. 1. shown ball valve, under the effect of pressure medium and spring force, push seat ring to spheroid, sealed by rubber o-ring or plastic seal ring, carbon seal ring etc. between valve seat (2) and valve body (3).The double sealing structure that valve seat (2) and spheroid (3) adopt T-shaped rubber ring (2.1) and metallic sealing section (2.2) to seal simultaneously, form the closed area of valve seat, under the effect of valve seat thrust, accurately calculate the shoulder height of T-shaped circle and metallic sealing section, guarantee rubber ring compressive strain, spheroid contacting metal sealing surface, ensure that the double-sealing effect of valve seat, have complementary advantages, compensate for the unstability of metal sealing, fragile with rubber seal, can not high voltage bearing shortcoming, substantially increase sealing stability and the life-span of valve seat, serve non-maintaining feature.
The present invention also reaches ideal effect in pressure testing, and under high pressure operating mode, valve base seal property is good, and under impure more operating mode, sealing is stable.After dismounting, sealing surface is without any damage.
The present invention and case study on implementation are only one of its structural feature encapsulation scheme; itself and valve seal and ball seal design philosophy are not limited only to the present invention; to the equivalence change done in seat design or modification, within Spirit Essence of the present invention, all should be encompassed within scope.
Claims (7)
1. a ball seat, double-sealing PMSS valve seat, valve seat (2) is arranged between spheroid (3) and valve body (1), O type rubber ring (2.4) or other type seal are housed between valve seat and valve body, preloading spring (2.5) is furnished with between valve seat and valve body, T-shaped rubber ring (2.1) Sealing is housed between valve seat and spheroid, and described T-shaped rubber parts internal diameter proximate portion is provided with chemical nickel phosphorus plating (ENP), built-up welding or coated with hard alloy etc. as metallic sealing section (2.2).
2. the ball seat according to right 1, its feature is provided with a different in nature groove at valve seat T-shaped circle position, special-shaped groove is other is provided with a collar groove, and special-shaped circle is fixed in special-shaped groove by collar (2.3), and at the bottom of special-shaped groove, bottom, footpath is provided with a metallic sealing section.
3. valve seat according to claim 2, its feature is being more than shore A90 with T-shaped rubber ring hardness.
4. valve seat according to claim 2, its feature is can chemical nickel phosphorus plating, built-up welding or spray various cemented carbide with metallic sealing section.
5. valve seat according to claim 2, its feature with T-shaped rubber ring by pressure medium after contact spheroid with metallic welded surfacing layer simultaneously, play double-sealing PMSS effect.
6. anisotropic rubber circle according to claim 3 is isosceles trapezoid.
7. metallic sealing section according to claim 4 need with spheroid match grinding, roughness is less than or equal to 0.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610046123.8A CN105485366A (en) | 2016-01-20 | 2016-01-20 | PMSS ball valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610046123.8A CN105485366A (en) | 2016-01-20 | 2016-01-20 | PMSS ball valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105485366A true CN105485366A (en) | 2016-04-13 |
Family
ID=55672543
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610046123.8A Pending CN105485366A (en) | 2016-01-20 | 2016-01-20 | PMSS ball valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105485366A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090284A (en) * | 2016-08-03 | 2016-11-09 | 常州大学 | A kind of super-large diameter is welded and fixed spherical ball valve double sealing structure entirely |
| CN107795704A (en) * | 2016-08-31 | 2018-03-13 | 费海鸿 | Ultrahigh vacuum ball valve |
| CN111963713A (en) * | 2020-09-21 | 2020-11-20 | 湖南高茨控制系统科技有限公司 | Elastic sealing device for fixed ball valve and sealing method thereof |
| CN114087391A (en) * | 2021-12-25 | 2022-02-25 | 江苏华英阀业有限公司 | Valve seat structure of small-size top-mounted fixed ball valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0814413A (en) * | 1994-06-24 | 1996-01-16 | Taimei Kinzoku Kogyo Kk | Seal device of valve |
| CN201496604U (en) * | 2009-08-27 | 2010-06-02 | 四川凯茨阀门制造有限公司 | Composite sealing ball valve |
| CN202418686U (en) * | 2011-11-04 | 2012-09-05 | 成都成高阀门有限公司 | Compound seal double-ball ball valve |
| CN203926889U (en) * | 2014-07-04 | 2014-11-05 | 球豹阀门有限公司 | A kind of fire-proof ball valve with Novel valve seat structure |
| CN104455524A (en) * | 2014-09-30 | 2015-03-25 | 江苏亿阀集团有限公司 | Composite sealing low-temperature ball valve |
-
2016
- 2016-01-20 CN CN201610046123.8A patent/CN105485366A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0814413A (en) * | 1994-06-24 | 1996-01-16 | Taimei Kinzoku Kogyo Kk | Seal device of valve |
| CN201496604U (en) * | 2009-08-27 | 2010-06-02 | 四川凯茨阀门制造有限公司 | Composite sealing ball valve |
| CN202418686U (en) * | 2011-11-04 | 2012-09-05 | 成都成高阀门有限公司 | Compound seal double-ball ball valve |
| CN203926889U (en) * | 2014-07-04 | 2014-11-05 | 球豹阀门有限公司 | A kind of fire-proof ball valve with Novel valve seat structure |
| CN104455524A (en) * | 2014-09-30 | 2015-03-25 | 江苏亿阀集团有限公司 | Composite sealing low-temperature ball valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106090284A (en) * | 2016-08-03 | 2016-11-09 | 常州大学 | A kind of super-large diameter is welded and fixed spherical ball valve double sealing structure entirely |
| CN106090284B (en) * | 2016-08-03 | 2018-03-02 | 常州大学 | A kind of super-large diameter is welded and fixed spherical ball valve double sealing structure entirely |
| CN107795704A (en) * | 2016-08-31 | 2018-03-13 | 费海鸿 | Ultrahigh vacuum ball valve |
| CN111963713A (en) * | 2020-09-21 | 2020-11-20 | 湖南高茨控制系统科技有限公司 | Elastic sealing device for fixed ball valve and sealing method thereof |
| CN111963713B (en) * | 2020-09-21 | 2022-05-17 | 湖南高茨控制系统科技有限公司 | Elastic sealing device for fixed ball valve and sealing method thereof |
| CN114087391A (en) * | 2021-12-25 | 2022-02-25 | 江苏华英阀业有限公司 | Valve seat structure of small-size top-mounted fixed ball valve |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160413 |