CN106885007A - The hard sealing high-temp. ball valve of bellows - Google Patents
The hard sealing high-temp. ball valve of bellows Download PDFInfo
- Publication number
- CN106885007A CN106885007A CN201510928652.6A CN201510928652A CN106885007A CN 106885007 A CN106885007 A CN 106885007A CN 201510928652 A CN201510928652 A CN 201510928652A CN 106885007 A CN106885007 A CN 106885007A
- Authority
- CN
- China
- Prior art keywords
- valve
- bellows
- seat
- ball valve
- valve body
- 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
-
- 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
- F16K5/204—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the plugs or parts of the plugs mechanically pressing the seals against the housing
Abstract
The hard sealing high-temp. ball valve of bellows
.Ball valve due to fluid resistance it is small, easy to operate, open and close rapid, good airproof performance and reliability high the features such as, obtained widely applying in industries such as petrochemical industry, long-distance transport pipes and urban heat supplyings.Seat material uses polytetrafluoroethylene (PTFE)（Or filled polytetrafluoroethylene）Be referred to as soft sealing ball valve, its temperature in use is no more than
200
℃.Seat material is referred to as hard seal ball valve or high-temperature ball valve using what metal made, and its temperature in use is higher than
250
℃.Present invention composition includes：Valve body, bellows, disk spring, valve seat, spheroid, upper valve rod, lower rotary shaft, there is the bellows described in two sections in described valve body, described bellows is connected with described disk spring, described disk spring is connected with described valve seat, described valve seat is connected with described spheroid, described upper valve rod is connected through described valve body with described lower rotary shaft.The present invention is applied to the hard sealing high-temp. ball valve of bellows.
Description
Technical field：
The present invention relates to a kind of hard sealing high-temp. ball valve of bellows.
Background technology：
Ball valve due to fluid resistance it is small, easy to operate, open and close rapid, good airproof performance and reliability high the features such as, in oil
The industries such as chemical industry, long-distance transport pipes and urban heat supplying have obtained widely applying.Seat material uses polytetrafluoroethylene (PTFE)（Or filling is poly-
Tetrafluoroethene）Be referred to as soft sealing ball valve, its temperature in use be no more than 200 DEG C.Seat material is referred to as firmly using what metal made
Seal ball-valve or high-temperature ball valve, its temperature in use are higher than 250 DEG C.In recent years in order to meet worst hot case the need for, domestic ectosphere
Valve manufacturing enterprise makes its open and close torque substantially reduce by optimizing high-temperature ball valve sealing structure, and service life is greatly prolonged, operation
Performance is significantly improved.
The content of the invention：
It is an object of the invention to provide a kind of hard sealing high-temp. ball valve of bellows.
Above-mentioned purpose is realized by following technical scheme：
A kind of hard sealing high-temp. ball valve of bellows, its composition includes：Valve body, bellows, disk spring, valve seat, spheroid, upper valve
Bar, lower rotary shaft, have the bellows described in two sections in described valve body, described bellows is connected with described disk spring,
Described disk spring is connected with described valve seat, and described valve seat is connected with described spheroid, and described upper valve rod passes through institute
The valve body stated, is connected with described lower rotary shaft；
The hard sealing high-temp. ball valve of described bellows, described bellows one end is welded on valve seat, and the other end is welded on valve body, valve
Sealing between seat and valve body realizes that the initial sealing power of the structure ball valve is carried jointly by the deformation of disc spring and bellows by bellows
For the sphere push valve seat for expanding at high operating temperatures is moved to both sides, compresses disc spring and bellows.
Beneficial effects of the present invention：
Sealed characteristic of the invention is mainly and uses metal-seated, and its advantage is wide Applicable temperature scope, the heat of various metals
The coefficient of expansion is more or less the same, as long as from proper, can reach basically identical, is conducive to coordinating temperature deformation.Have the disadvantage material
Hardness is high, reach it is higher than pressure necessary to sealing, even if reaching sealing using pretightning force, but because of seal pressure greatly, valve seat and ball
Abrasion between body is also very big, and because metallic sealing section coefficient of friction is larger, causes the keying torque of ball valve larger.Cause
This, high-temperature ball valve uses elastic seal pair mostly, and its dependable performance, elastic compensating ability is strong, and Applicable temperature scope is wide, and to floating
Dynamic spherical ball valve and fixed spherical ball valve are all suitable for.In the presence of pretightning force and Fluid pressure, valve seat is compressed high-temperature ball valve with spheroid,
It is deformed sealing surface of seat and reaches sealing.Its sealing effectiveness depends on effect of the valve seat in Fluid pressure and pretightning force
Under, can compensate for the degree of spheroid out-of-roundness and nao-and micro relief.Therefore, must have between valve seat and spheroid sufficiently large close
Envelope should meet than pressure qb
In formula,
What qb --- guarantee regulating valve was sealed must be than pressure
Q --- it is actual than pressure during valve working
The ratio pressure allowable of [q] --- seat material.
Hard sealing high-temp. ball valve of the invention includes following five kinds different minor variations forms：
1. hard sealing high-temp. ball valve is by the flexible graphite sealing ring group between valve body, spheroid, valve rod, metal seat valve and valve seat and valve body
Into.Two valve seats are symmetrical centre insertion valve body with valve rod axle center, and valve seat can slide in valve body embedded groove, valve seat and valve body it
Between sealing realized by flexible graphite sealing ring.Due to the compressible deformation of flexible graphite sealing ring, the structure ball valve is certain
Using that will not block akinesia because of spheroid expanded by heating in temperature range, this structure hard seal ball valve can be used for temperature and be no more than
343 DEG C of operating mode.
2. high-temperature ball valve metallic elastic circle makees valve seat insert, for compensating the external conditions such as the temperature difference, pressure and abrasion
Change influences on ball valve sealing performance.The valve is close by the soft graphite between valve body, spheroid, valve rod, metal seat valve, valve seat and valve body
Seal, metallic elastic circle, metallic elastic circle pressure ring and sealing gasket composition.Two valve seats one are that can be slided in valve body embedded groove
Metal seat valve, another be deformable metallic elastic circle valve seat.Structure ball valve metallic elastic in spheroid expanded by heating
Circle valve seat is deformable, spheroid is blocked akinesia.
3. high-temperature ball valve loads sealing auxiliary structure using disk spring.The valve is by valve body, spheroid, valve rod, valve rear valve base, valve
The composition such as valve seat insert, pressure ring and disk spring before valve seat, valve before rear valve base sealing ring, valve.Valve seat is close before valve seat, valve before valve
Seal, pressure ring are a component, and disk spring is pressed on component.Disk spring is pressurized after ball valve assembling, and it is on the one hand for valve is close
Envelope provides starting force, and the sealing ring between another aspect compression valve seat and valve body makes to be sealed between valve seat and valve body.The structure ball valve two
Individual valve seat is embedded in valve body by symmetrical centre of valve rod axle center, and valve seat can be slided in valve body embedded groove, in spheroid expanded by heating
Valve component is slided, disk spring compressive deformation, it is to avoid spheroid blocks akinesia.
4. hard sealing high-temp. ball valve, after the valve is by valve seat, disk spring, valve rear valve base, valve before valve body, spheroid, valve rod, valve
Flexible graphite sealing ring between valve seat and valve body etc. is constituted.Ball valve rear valve base threads directly into valve body and compressed flexible by screw thread
Carbon seal ring, makes sealing between valve rear valve base and valve body be no longer rely on the carbon seal ring of disk spring compressed flexible to ensure valve seat
Sealing and between valve body.Valve seat radially has gap and between valve body before ball valve, and in spheroid expanded by heating, valve seat can be in valve before valve
In body groove slidably, dish-shaped camber of spring is compressed, makes spheroid avoid blocking akinesia.
5. high-temperature ball valve is commonly used under some high parameter operating modes.The valve is main by valve body, spheroid, valve seat, upper valve rod, lower valve
Sealing ring composition between bar, helical spring, pressing plate, valve seat and valve body.Spheroid is supported by upper and lower valve rod and positioned, and is made in pressure medium
Used time, the displacement of spheroid valveless body axis direction.Two valve seats can be slided in valve body groove, the sphere push when spheroid expanded by heating
Valve seat is slided and compression spring deformation in valve body groove, makes the spheroid will not stuck akinesia.Helical spring can use dish in
Shape spring replaces, and also valve rod and spheroid can be fabricated into integral structure form.
Brief description of the drawings：
Fig. 1 is structural representation of the invention.In figure, 1 valve body, 2 bellowss, 3 disk springs, 4 valve seats, 5 upper valve rods, 6 spheroids,
7 lower rotary shafts.
Specific embodiment：
Embodiment 1：
A kind of hard sealing high-temp. ball valve of bellows, its composition includes：Valve body, bellows, disk spring, valve seat, spheroid, upper valve
Bar, lower rotary shaft, have the bellows described in two sections in described valve body, described bellows is connected with described disk spring,
Described disk spring is connected with described valve seat, and described valve seat is connected with described spheroid, and described upper valve rod passes through institute
The valve body stated, is connected with described lower rotary shaft；
Embodiment 2：
The hard sealing high-temp. ball valve of bellows described in embodiment 1, described bellows one end is welded on valve seat, and the other end is welded in valve
On body, sealing between valve seat and valve body is realized by bellows, the initial sealing power of the structure ball valve by disc spring and bellows change
Shape is provided jointly, and the sphere push valve seat for expanding at high operating temperatures is moved to both sides, compresses disc spring and bellows.
Claims (2)
1. a kind of hard sealing high-temp. ball valve of bellows, its composition includes：Valve body, bellows, disk spring, valve seat, spheroid, upper valve
Bar, lower rotary shaft, it is characterized in that：There is the bellows described in two sections, described bellows and described dish in described valve body
Spring is connected, and described disk spring is connected with described valve seat, and described valve seat is connected with described spheroid, described upper valve
Bar is connected through described valve body with described lower rotary shaft.
2. the hard sealing high-temp. ball valve of bellows according to claim 1, it is characterized in that：Described bellows one end is welded in valve
On seat, the other end is welded on valve body, and the sealing between valve seat and valve body is realized by bellows, the initial sealing power of the structure ball valve by
The deformation of disc spring and bellows is provided jointly, and the sphere push valve seat for expanding at high operating temperatures is moved to both sides, compresses disc spring
And bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510928652.6A CN106885007A (en) | 2015-12-15 | 2015-12-15 | The hard sealing high-temp. ball valve of bellows |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510928652.6A CN106885007A (en) | 2015-12-15 | 2015-12-15 | The hard sealing high-temp. ball valve of bellows |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106885007A true CN106885007A (en) | 2017-06-23 |
Family
ID=59175200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510928652.6A Pending CN106885007A (en) | 2015-12-15 | 2015-12-15 | The hard sealing high-temp. ball valve of bellows |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106885007A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019211506A1 (en) * | 2018-05-03 | 2019-11-07 | Metso Flow Control Oy | A valve sealing arrangement and a valve seat |
| CN110553054A (en) * | 2018-05-30 | 2019-12-10 | 丹佛斯有限公司 | Ball valve insert and valve member unit |
-
2015
- 2015-12-15 CN CN201510928652.6A patent/CN106885007A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019211506A1 (en) * | 2018-05-03 | 2019-11-07 | Metso Flow Control Oy | A valve sealing arrangement and a valve seat |
| US11209089B2 (en) | 2018-05-03 | 2021-12-28 | Neles Finland Oy | Valve sealing arrangement and a valve seat |
| CN110553054A (en) * | 2018-05-30 | 2019-12-10 | 丹佛斯有限公司 | Ball valve insert and valve member unit |
| CN110553054B (en) * | 2018-05-30 | 2021-12-28 | 丹佛斯有限公司 | Valve member unit, ball valve and method of manufacturing ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170623 |