CN105526376A - Dynamic load sealing type two-valve-seat structure of fixed ball-valve - Google Patents
Dynamic load sealing type two-valve-seat structure of fixed ball-valve Download PDFInfo
- Publication number
- CN105526376A CN105526376A CN201610069327.3A CN201610069327A CN105526376A CN 105526376 A CN105526376 A CN 105526376A CN 201610069327 A CN201610069327 A CN 201610069327A CN 105526376 A CN105526376 A CN 105526376A
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- China
- Prior art keywords
- valve
- valve seat
- floating
- seat
- ball
- 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.)
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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
- 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
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/06—Construction of housing; Use of materials therefor of taps or cocks
- F16K27/067—Construction of housing; Use of materials therefor of taps or cocks with spherical plugs
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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
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention relates to a dynamic load sealing type two-valve-seat structure of a fixed ball-valve. An inner step is formed in a valve body. An elastic support body is arranged in the inner step. A support ring is arranged at the front end of the elastic support body. A fixed valve seat is arranged at the front end of the support ring. Filler is arranged between the fixed valve seat and the support ring. A floating valve seat is arranged at the front end of the fixed valve seat. The front end face of the fixed valve seat is an inward-concave spherical face. The rear end face of the floating valve seat is an outward-convex spherical face. The floating valve seat makes contact with the fixed valve seat through the matched spherical faces. The front end face of the floating valve seat makes contact with a valve ball. According to the dynamic load sealing type two-valve-seat structure, the floating valve seat can do trace deflection along with the valve ball, and when the valve acts, positional deviation inevitably generated in the valve ball machining and assembling processes can be made up, so that the sealing reliability of the floating valve seat and the valve ball is ensured. Meanwhile, the phenomenon that due to the fact that the floating valve seat rotates along with the valve ball, a large margin of deflection is generated, and then sealing between the floating valve seat and the fixed valve seat is influenced is avoided.
Description
Technical field
The present invention relates to a kind of valve seat construction, the present invention especially relates to a kind of fixing ball valve dynamic load sealed type double-valve-seat structure.
Background technique
Ball valve is applied to high temperature, the high pressure operating mode of the industries such as power plant, iron and steel, oil refining, Coal Chemical Industry more and more widely.But, for floating ball valve, one-way sealing can only be realized because structural feature determines it, therefore correct installation direction is adopted just to seem very crucial, on the other hand, even if having employed correct installation direction, also often there is the case that floating ball valve damages because being subject to the backpressure from downstream, when situation is serious, even causing package unit scram.In view of above reason, higher and the fixing ball valve with bi-directional sealing capabilities must be adopted under easily there is the special operation condition of backpressure at some pressure.
In current prior art, the valve seat of fixed ball valve sealing configuration being applied to worst hot case adopts graphite packing as the seal element between valve seat and valve body usually, by the support ring being arranged on the valve seat back side, graphite packing being compressed, butterfly spring or cylindrical spring being installed for providing elastic compensating at the back side of support ring.When valve ball rotates, due to the tolerance of size certainly existed cause valve ball be easy to toward above, below or side produce micro-beat, and now valve seat is fixed by graphite packing due to radial direction, can only move along axial direction, cannot follow sphere beat together, cause sealing surface of seat and sphere no longer concentric, ball face sealing originally becomes linear sealing or dot encapsulation, finally cause sealing surface wear, moment of torsion obviously to become large, even valve bite, be difficult to regular event.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide that a kind of sealing is reliable, flexible movements and long-life fixing ball valve dynamic load sealed type double-valve-seat structure.
According to technological scheme provided by the invention, described fixing ball valve dynamic load sealed type double-valve-seat structure, comprises valve body, valve ball, floating valve seat, fixed valve base, filler, support ring and elastic support, interior step is offered in valve body, elastic support is provided with in this interior step, the front end of elastic support is provided with support ring, the front end of support ring is provided with fixed valve base, filler is provided with between fixed valve base and support ring, floating valve seat is provided with in the front end of fixed valve base, the front-end face of fixed valve base is interior concave spherical surface, the ear end face of floating valve seat is outer convex spherical, sphere by cooperatively interacting between floating valve seat with fixed valve base contacts, the front-end face of floating valve seat is interior concave spherical surface, floating valve seat is contacted with valve ball by interior concave spherical surface, floating valve seat outside described outer convex spherical is provided with spacing seam.
Compared with the prior art the present invention has the following advantages:
1, valve ball can be followed due to floating valve seat and make micro-beat, the tolerance of size produced in valve ball processing and assembly process can be made up when valve event, before making floating valve seat, sealing surface is concentric all the time with valve ball, guarantees that sealing is reliable, valve event is smooth and easy, alleviates sealing surface wear;
2, the floating valve seat back side is provided with spacing seam, avoids the sealing that floating valve seat occurs significantly beat because following valve ball and rotating and then affects between floating valve seat and fixed valve base;
3, the sealing surface between floating valve seat and valve ball and fixed valve base is spherical, even if make floating valve seat follow valve ball make the sealing reliability that micro-beat also can guarantee between floating valve seat and fixed valve base;
4, when valve is in unloaded state, butterfly spring provides pretightening force to push valve component to valve ball, is provided the required specific pressure of sealing under high pressure by medium pressure itself.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Fig. 2 is the enlarged view of part A in Fig. 1.
Embodiment
Below in conjunction with specific embodiment, the invention will be further described.
This fixing ball valve dynamic load sealed type double-valve-seat structure, comprises valve body 1, valve ball 2, floating valve seat 3, fixed valve base 4, filler 5, support ring 6 and elastic support 7, is provided with valve ball 2 in valve casing, interior step is offered in valve body 1, elastic support 7 is provided with in this interior step, the front end of elastic support 7 is provided with support ring 6, the front end of support ring 6 is provided with fixed valve base 4, filler 5 is provided with between fixed valve base 4 and support ring 6, floating valve seat 3 is provided with in the front end of fixed valve base 4, the front-end face of fixed valve base 4 is interior concave spherical surface 4a, the ear end face of floating valve seat 3 is outer convex spherical 3a, sphere by cooperatively interacting between floating valve seat 3 with fixed valve base 4 contacts, the front-end face of floating valve seat 3 is interior concave spherical surface 3c, described floating valve ball 3 is contacted with valve ball 2 by interior concave spherical surface 3c, floating valve seat outside described outer convex spherical 3a is provided with spacing seam 3b.
In the present invention, floating valve seat 3 is arranged between valve ball 2 and fixed valve base 4, the interior concave spherical surface 3c of floating valve seat 3 matches with valve ball 2, described fixed valve base 4 is arranged in valve body 1, the front-end face of fixed valve base 4 is interior concave spherical surface 4a, the ear end face of floating valve seat 3 is outer convex spherical 3a, the front-end face of fixed valve base 4 is matched by sphere with the ear end face of floating valve seat 3, described filler 5 is arranged between fixed valve base 4 and valve body 1, filler 5 compresses and forms sealing by described support ring 6, described elastic support 7 is arranged on support ring 6 back side, pretightening force is provided to valve component under valve unloaded state.
Working principle of the present invention is as follows:
Valve ball 2 can be followed due to floating valve seat 3 and make micro-beat, the tolerance of size that valve ball 2 is processed and produced in assembly process can be made up when valve event, make the front-end face of floating valve seat 3 concentric all the time with valve ball 2, guarantee that sealing is reliable, valve event is smooth and easy, alleviate sealing surface wear; The back side of floating valve seat 3 is provided with spacing seam 3b, avoids floating valve seat 3 because following valve ball 2 and rotate and the sealing occurring significantly beat and then affect between floating valve seat 3 and fixed valve base 4; Sealing surface between floating valve seat 3 and valve ball 2 and fixed valve base 4 is spherical, even if make floating valve seat 3 follow valve ball 2 make the sealing reliability that micro-beat also can guarantee between floating valve seat 3 and fixed valve base 4; When valve is in unloaded state, elastic support 7 provides pretightening force to push valve component to valve ball 2, is provided the required specific pressure of sealing under high pressure by medium pressure itself.
Claims (4)
1. a fixing ball valve dynamic load sealed type double-valve-seat structure, comprise valve body (1), valve ball (2), floating valve seat (3), fixed valve base (4), filler (5), support ring (6) and elastic support (7), it is characterized in that: in valve body (1), offer interior step, elastic support (7) is provided with in this interior step, the front end of elastic support (7) is provided with support ring (6), the front end of support ring (6) is provided with fixed valve base (4), filler (5) is provided with between fixed valve base (4) and support ring (6), floating valve seat (3) is provided with in the front end of fixed valve base (4), the front-end face of fixed valve base (4) is interior concave spherical surface (4a), the ear end face of floating valve seat (3) is outer convex spherical (3a), contacted by the sphere cooperatively interacted between floating valve seat (3) with fixed valve base (4), the front-end face of floating valve seat (3) is interior concave spherical surface (3c), floating valve seat (3) is contacted with valve ball (2) by interior concave spherical surface (3c), outer convex spherical (3a) outside on described floating valve seat (3) is provided with spacing seam (3b).
2. fixing ball valve dynamic load sealed type double-valve-seat structure as claimed in claim 1, is characterized in that: containing a fixed valve base (4) and a floating valve seat (3), described floating valve seat (3) is arranged between valve ball (2) and fixed valve base (4).
3. floating valve seat as claimed in claim 1, is characterized in that: the front-end face of described floating valve seat (3) is interior concave spherical surface (3c), and ear end face is outer convex spherical (3a).
4. fixed valve base (4) as claimed in claim 1, is characterized in that: the front-end face of described fixed valve base (4) is interior concave spherical surface (4a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610069327.3A CN105526376B (en) | 2016-02-01 | 2016-02-01 | Fixing ball valve dynamic load closed type bivalve holder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610069327.3A CN105526376B (en) | 2016-02-01 | 2016-02-01 | Fixing ball valve dynamic load closed type bivalve holder structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105526376A true CN105526376A (en) | 2016-04-27 |
| CN105526376B CN105526376B (en) | 2018-02-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610069327.3A Active CN105526376B (en) | 2016-02-01 | 2016-02-01 | Fixing ball valve dynamic load closed type bivalve holder structure |
Country Status (1)
| Country | Link |
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| CN (1) | CN105526376B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485007A (en) * | 2018-11-23 | 2019-03-19 | 重庆隆携信息技术有限公司 | Ration distribution control system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1618976A1 (en) * | 1988-12-05 | 1991-01-07 | Центральное конструкторское бюро нефтеаппаратуры | Ball valve |
| US5746417A (en) * | 1995-02-16 | 1998-05-05 | The Duriron Company, Inc. | Adjustable ball valve |
| CN202074069U (en) * | 2011-04-25 | 2011-12-14 | 郑州华泰特阀有限公司 | High-temperature abrasion-resistant ball valve |
| CN104165235A (en) * | 2014-07-31 | 2014-11-26 | 章华 | Ball valve metal valve base with elastic compensation function |
| CN203963102U (en) * | 2014-07-23 | 2014-11-26 | 自贡自高阀门有限公司 | A kind of T-shaped threeway fixing ball valve |
| CN205504051U (en) * | 2016-02-01 | 2016-08-24 | 无锡智能自控工程股份有限公司 | Fixed ball valve moves and carries two valve holder structure of canned type |
-
2016
- 2016-02-01 CN CN201610069327.3A patent/CN105526376B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1618976A1 (en) * | 1988-12-05 | 1991-01-07 | Центральное конструкторское бюро нефтеаппаратуры | Ball valve |
| US5746417A (en) * | 1995-02-16 | 1998-05-05 | The Duriron Company, Inc. | Adjustable ball valve |
| CN202074069U (en) * | 2011-04-25 | 2011-12-14 | 郑州华泰特阀有限公司 | High-temperature abrasion-resistant ball valve |
| CN203963102U (en) * | 2014-07-23 | 2014-11-26 | 自贡自高阀门有限公司 | A kind of T-shaped threeway fixing ball valve |
| CN104165235A (en) * | 2014-07-31 | 2014-11-26 | 章华 | Ball valve metal valve base with elastic compensation function |
| CN205504051U (en) * | 2016-02-01 | 2016-08-24 | 无锡智能自控工程股份有限公司 | Fixed ball valve moves and carries two valve holder structure of canned type |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109485007A (en) * | 2018-11-23 | 2019-03-19 | 重庆隆携信息技术有限公司 | Ration distribution control system |
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| Publication number | Publication date |
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| CN105526376B (en) | 2018-02-06 |
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