CN104653809A - Pressure balanced metal valve seat sealing structure of high pressure adjusting ball valve - Google Patents
Pressure balanced metal valve seat sealing structure of high pressure adjusting ball valve Download PDFInfo
- Publication number
- CN104653809A CN104653809A CN201510073372.1A CN201510073372A CN104653809A CN 104653809 A CN104653809 A CN 104653809A CN 201510073372 A CN201510073372 A CN 201510073372A CN 104653809 A CN104653809 A CN 104653809A
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- CN
- China
- Prior art keywords
- valve
- ring
- type metal
- metal seat
- balance type
- 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
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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
- F16K5/0689—Packings between housing and plug
-
- 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
Abstract
The invention relates to a pressure balanced metal valve seat sealing structure of a high pressure adjusting ball valve. A sealing surface matched with the surface of a valve ball is arranged at the inner end of a pressure balanced metal valve seat; a shoulder is arranged on the outer peripheral wall of the pressure balanced metal valve seat, a step is arranged on the inner peripheral wall of the inner cavity of a valve body, and a metal elastic energy increasing ring is arranged between the shoulder and the step; a balance hole is formed in the pressure balanced metal valve seat, an inner end opening of the balance hole is formed in the sealing surface, an outer end opening of the balance hole is formed in the plane of the shoulder, and the outer end opening of the balance ring is correspondingly matched with the metal elastic energy increasing ring; a front sealing ring and a rear sealing ring are respectively assembled between the outer peripheral wall of the pressure balanced metal valve seat and the inner peripheral wall of the inner cavity of the valve seat in a sealing mode, the front sealing ring is positioned on the outer side of the metal elastic energy increasing ring, and the rear sealing ring is positioned on the inner side of the metal elastic energy increasing ring. The pressure balanced metal valve seat sealing structure is simple in structure, and the high pressure adjusting ball valve adopting the sealing structure is reliable in performance, moderate in torque, resistant to wear, flexible in motion and long in service life.
Description
Technical field
The present invention relates to valve base sealing structure, specifically a kind of high-pressure regulation ball valve pressure balance type metal seat valve sealing configuration, belongs to fluid control technology field.
Background technique
High-pressure regulation ball valve in sector applications such as power plant, iron and steel, oil refining, Coal Chemical Industries widely.Due to structural features such as the distinctive whole ball of ball valve, Concentric rotation, double-valve-seats, make it can bear larger pressure and pressure reduction than other forms of valve, the nominal pressure grade of current high-pressure regulation ball valve can reach ANSI 4500LB, and other form valves can only work usually under the nominal pressure being less than ANSI 1500LB.Add upper ball valve and have that negotiability is large, the pressure loss is little, good sealing effect, manufacture and the advantage such as easy to maintenance, high-pressure regulation ball valve use occasion demand that is higher at some pressure, that need frequent movement is constantly risen.
In current prior art, high-pressure regulation ball valve adopts butterfly spring or cylindrical spring as the elastic compensation element of metal seat valve usually, metal seat valve is pressed on ball surface by the elastic force relying on spring to provide, and ensures the necessary specific pressure of good sealing effect with this.In valve event process, metal seat valve and valve ball are in high pressure Frotteurism all the time, high-pressure ball valve is made to need larger operation moment of torsion, simultaneously metal seat valve damages because of frequent movement with valve ball sealing surface is very easy, therefore adopts the high-pressure ball valve of said structure to compare to be applicable to that operating frequency is lower, needs the use occasion of emergency cut-off under special status.If by above-mentioned valve applications in the adjustment operating mode needing long term frequent action, valve can be caused greatly to shorten working life, and wherein metal seat valve sealing configuration has become ball valve dexterity of action and the bottleneck in working life in this type of high-pressure regulation operating mode.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of high-pressure regulation ball valve pressure balance type metal seat valve sealing configuration is provided, its structure is simple, adopt the high-pressure regulation ball valve reliable performance of sealing structure, be suitable for using under the harsh operating mode needing frequent movement, there is the advantages such as moment of torsion is moderate, wear-resistant, flexible movements, long service life, long-term efficient, the safe and stable operation of assurance device.
According to technological scheme provided by the invention: high-pressure regulation ball valve pressure balance type metal seat valve sealing configuration, it is characterized in that: comprise pressure balance type metal seat valve, front seal ring, metallic elastic energization ring and increasing back sealing ring, described pressure balance type metal seat valve the inner is provided with the sealing surface matched with ball surface; Described pressure balance type metal seat valve periphery wall is provided with shoulder, described body cavity inner circle wall is provided with step, described metallic elastic energization ring is arranged between shoulder and step; Described pressure balance type metal seat valve is provided with equalizing orifice, and in described equalizing orifice, end opening is positioned on sealing surface, and equalizing orifice outer end opening is positioned on shoulder plane; Described front seal ring and increasing back sealing ring all seal and are assemblied between pressure balance type metal seat valve periphery wall and valve base cavity inner circle wall, and front seal ring is positioned at outside metallic elastic energization ring, and increasing back sealing ring is positioned at inside metallic elastic energization ring.
As a further improvement on the present invention, the periphery wall of described pressure balance type metal seat valve outer end is provided with the first annular groove, the periphery wall of pressure balance type metal seat valve the inner is provided with the second annular groove, described front seal ring is inlaid in the first annular groove, and described increasing back sealing ring is inlaid in the second annular groove.
As a further improvement on the present invention, described metallic elastic energization ring is hollow-core construction, is full of inert gas in its cavity.
compared with the prior art the present invention, has the following advantages:
1, structure of the present invention is simple, adopt the high-pressure regulation ball valve reliable performance of sealing structure, be suitable for using under the harsh operating mode needing frequent movement, there is the advantages such as moment of torsion is moderate, wear-resistant, flexible movements, long service life, long-term efficient, the safe and stable operation of assurance device.
2, the metallic elastic energization ring in the present invention can rely on the elastic force that metallic elastic is out of shape and inert gas compressive strain produces to carry out pretension to pressure balance type metal seat valve, makes pressure balance type metal seat valve be fitted in ball surface when valve is unloaded with lower specific pressure;
3, the metallic elastic energization ring in the present invention is air bag compression structure, makes compare common belleville spring its working life or cylindrical spring is greatly improved.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention metal seat valve sealing configuration.
Fig. 2 be the valve of metal seat valve sealing configuration in application drawing 1 in the closed position time phase diagram.
Fig. 3 be the valve of metal seat valve sealing configuration in application drawing 1 in an open position time phase diagram.
Fig. 4 is the structural representation of pressure balance type metal seat valve in Fig. 1.
Fig. 5 is the structural representation of metallic elastic energization ring in Fig. 1.
Description of reference numerals: seal ring, 5-metallic elastic energization ring, 5a-cavity, 6-increasing back sealing ring, PV-valve seat back pressure, P1-valve inlet place pressure, P2-valve pocket pressure before 1-valve body, 1a-step, 2-pressure balance type metal seat valve, 2a-shoulder, 2b-equalizing orifice, 2c-first sealed groove, 2d-second sealed groove, 3-valve ball, 4-.
Embodiment
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in the figure: the high-pressure regulation ball valve pressure balance type metal seat valve sealing configuration in embodiment forms primarily of valve seat 2, front seal ring 4, metallic elastic energization ring 5 and increasing back sealing ring 6.
As shown in Fig. 1 ~ Fig. 4, described pressure balance type metal seat valve 2 the inner is provided with sealing surface, matches with valve ball 3 surface in sealing face; Described pressure balance type metal seat valve 2 periphery wall is provided with shoulder 2a, and described valve body 1 inner chamber inner circle wall is provided with step 1a, and described metallic elastic energization ring 5 is arranged between shoulder 2a and step 1a; Described pressure balance type metal seat valve 2 is provided with equalizing orifice 2b, and in described equalizing orifice 2b, end opening is positioned on sealing surface, and equalizing orifice 2b outer end opening is positioned in shoulder 2a plane; Described front seal ring 4 and increasing back sealing ring 6 all seal and are assemblied between pressure balance type metal seat valve 2 periphery wall and valve seat 2 inner chamber inner circle wall, and front seal ring 4 is positioned at outside metallic elastic energization ring 5, and increasing back sealing ring 6 is positioned at inside metallic elastic energization ring 5.
As shown in Figure 4, the periphery wall of described pressure balance type metal seat valve 2 outer end is provided with the first annular groove 2c, the periphery wall of pressure balance type metal seat valve 2 the inner is provided with the second annular groove 2d, described front seal ring 4 is inlaid in the first annular groove 2c, and described increasing back sealing ring 6 is inlaid in the second annular groove 2d.
As shown in Figure 5, in the embodiment of the present invention, described metallic elastic energization ring 5 is hollow-core construction, is full of inert gas in its cavity 5a.The metallic elastic energization ring 5 of this spline structure can rely on the elastic force that metallic elastic is out of shape and inert gas compressive strain produces to carry out pretension to pressure balance type metal seat valve 2, makes pressure balance type metal seat valve 2 be fitted in valve ball 3 surface when valve is unloaded with lower specific pressure.And because metallic elastic energization ring 5 is air bag compression structure, make compare common belleville spring its working life or cylindrical spring is greatly improved.
Working principle of the present invention is as follows:
As shown in Figure 2, when the valve applying this metal seat valve 2 sealing mechanism is in the closed position, because the chamber at shoulder 2a place, pressure balance type metal seat valve 2 back side is connected with the runner of valve body 1 by equalizing orifice 2b, the valve seat back pressure PV now had in chamber is equal with valve inlet place pressure P 1, and valve seat back pressure PV is greater than valve pocket pressure P 2, pressure balance type metal seat valve 2 is pressed on valve ball 3 surface by the pressure difference that valve seat back pressure PV and valve pocket pressure P 2 are formed, and valve relies on medium pressure itself to realize sealing.
As shown in Figure 3, when the valve applying this metal seat valve 2 sealing mechanism is in an open position, throttling section is formed between the runner of pressure balance type metal seat valve 2 and valve ball 3, according to principle of hydrodynamics, medium is raised by flow velocity during throttling section, static pressure reduces, now valve seat back pressure PV is less than valve pocket pressure P 2, the pressure difference that now valve seat back pressure PV and valve pocket pressure P 2 are formed produces reaction force, pressure balance type metal seat valve 2 is pushed away valve ball 3 surface by this opposition, thus alleviate the fretting wear of valve seat 2 sealing surface, extend valve working life, reduce the operation moment of torsion of valve simultaneously, improve flexibility during valve frequent movement, improve the adjusting function of valve.
Claims (3)
1. high-pressure regulation ball valve pressure balance type metal seat valve sealing configuration, it is characterized in that: comprise pressure balance type metal seat valve (2), front seal ring (4), metallic elastic energization ring (5) and increasing back sealing ring (6), described pressure balance type metal seat valve (2) the inner is provided with the sealing surface matched with valve ball (3) surface; Described pressure balance type metal seat valve (2) periphery wall is provided with shoulder (2a), described valve body (1) inner chamber inner circle wall is provided with step (1a), described metallic elastic energization ring (5) is arranged between shoulder (2a) and step (1a); Described pressure balance type metal seat valve (2) is provided with equalizing orifice (2b), and described equalizing orifice (2b) interior end opening is positioned on sealing surface, and equalizing orifice (2b) outer end opening is positioned in shoulder (2a) plane; Described front seal ring (4) and increasing back sealing ring (6) all seal and are assemblied between pressure balance type metal seat valve (2) periphery wall and valve seat (2) inner chamber inner circle wall, front seal ring (4) is positioned at metallic elastic energization ring (5) outside, and increasing back sealing ring (6) is positioned at metallic elastic energization ring (5) inner side.
2. high-pressure regulation ball valve pressure balance type metal seat valve sealing configuration as claimed in claim 1, it is characterized in that: the periphery wall of described pressure balance type metal seat valve (2) outer end is provided with the first annular groove (2c), the periphery wall that pressure balance type metal seat valve (2) is inner is provided with the second annular groove (2d), described front seal ring (4) is inlaid in the first annular groove (2c), and described increasing back sealing ring (6) is inlaid in the second annular groove (2d).
3. high-pressure regulation ball valve pressure balance type metal seat valve sealing configuration as claimed in claim 1, is characterized in that: described metallic elastic energization ring (5) is hollow-core construction, is full of inert gas in its cavity (5a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510073372.1A CN104653809A (en) | 2015-02-10 | 2015-02-10 | Pressure balanced metal valve seat sealing structure of high pressure adjusting ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510073372.1A CN104653809A (en) | 2015-02-10 | 2015-02-10 | Pressure balanced metal valve seat sealing structure of high pressure adjusting ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104653809A true CN104653809A (en) | 2015-05-27 |
Family
ID=53245272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510073372.1A Pending CN104653809A (en) | 2015-02-10 | 2015-02-10 | Pressure balanced metal valve seat sealing structure of high pressure adjusting ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104653809A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404557A (en) * | 2018-12-20 | 2019-03-01 | 启东市冶金机械有限公司 | Flexible sealing pulverized coal spraying ball valve |
| CN113324064A (en) * | 2021-06-03 | 2021-08-31 | 苏州澎瀚阀门有限公司 | Low-temperature crystallization valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795132A (en) * | 1981-04-28 | 1989-01-03 | The British Petroleum Company P.L.C. | Seals |
| US5542645A (en) * | 1983-11-14 | 1996-08-06 | Beson; John | Dual seal valve |
| CN202674366U (en) * | 2012-06-28 | 2013-01-16 | 张业宝 | Valve seat of ball valve |
| CN202756656U (en) * | 2012-08-20 | 2013-02-27 | 天津祥嘉流体控制系统有限公司 | Top-mounted ultra-low temperature ball valve |
| CN203560507U (en) * | 2013-11-21 | 2014-04-23 | 盐城圣科球阀有限公司 | Novel quadruple-combined sealing pipeline ball valve seat |
| CN204042065U (en) * | 2013-11-30 | 2014-12-24 | 无锡智能自控工程股份有限公司 | High Temperature High Pressure regulates ball valve balance type metal seat valve sealing configuration |
| CN204664465U (en) * | 2015-02-10 | 2015-09-23 | 无锡智能自控工程股份有限公司 | High-pressure regulation ball valve pressure balance type metal seat valve sealing configuration |
-
2015
- 2015-02-10 CN CN201510073372.1A patent/CN104653809A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4795132A (en) * | 1981-04-28 | 1989-01-03 | The British Petroleum Company P.L.C. | Seals |
| US5542645A (en) * | 1983-11-14 | 1996-08-06 | Beson; John | Dual seal valve |
| CN202674366U (en) * | 2012-06-28 | 2013-01-16 | 张业宝 | Valve seat of ball valve |
| CN202756656U (en) * | 2012-08-20 | 2013-02-27 | 天津祥嘉流体控制系统有限公司 | Top-mounted ultra-low temperature ball valve |
| CN203560507U (en) * | 2013-11-21 | 2014-04-23 | 盐城圣科球阀有限公司 | Novel quadruple-combined sealing pipeline ball valve seat |
| CN204042065U (en) * | 2013-11-30 | 2014-12-24 | 无锡智能自控工程股份有限公司 | High Temperature High Pressure regulates ball valve balance type metal seat valve sealing configuration |
| CN204664465U (en) * | 2015-02-10 | 2015-09-23 | 无锡智能自控工程股份有限公司 | High-pressure regulation ball valve pressure balance type metal seat valve sealing configuration |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109404557A (en) * | 2018-12-20 | 2019-03-01 | 启东市冶金机械有限公司 | Flexible sealing pulverized coal spraying ball valve |
| CN113324064A (en) * | 2021-06-03 | 2021-08-31 | 苏州澎瀚阀门有限公司 | Low-temperature crystallization valve |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |