CN101539212A - Ball valve with composite valve seat - Google Patents
Ball valve with composite valve seat Download PDFInfo
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- CN101539212A CN101539212A CN200910302241A CN200910302241A CN101539212A CN 101539212 A CN101539212 A CN 101539212A CN 200910302241 A CN200910302241 A CN 200910302241A CN 200910302241 A CN200910302241 A CN 200910302241A CN 101539212 A CN101539212 A CN 101539212A
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- valve
- valve seat
- ball
- composite
- ball valve
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Abstract
The invention relates to a ball valve, in particular to a ball valve with a composite valve seat. The ball valve comprises a ball body and the valve seat and is characterized in that the valve seat comprises a steel groove ring; an end face at one side of the groove ring is provided with a circular embedding groove; a valve port, which consists of a plurality of layers of hard and soft concentric rings which are respectively made of steel materials and elastic wearable materials and alternately and closely overlapped, is embedded in the groove ring; and the curved surface of a surface of each concentric ring constituting the valve port, which faces to the ball body, is identical with the spherical surface of the ball body. Due to the adoption of the composite valve port consisting of the hard and soft concentric rings, the ball valve with the composite valve seat has certain capability for buffering deformation, and clearance is eliminated under the pressure promotion of a medium, thereby greatly improving the sealing property and meanwhile reducing the processing difficulty and cost.
Description
Technical field
The present invention relates to a kind of ball valve, particularly ball valve with composite valve seat.
Background technique
In order to guarantee the sealing of ball valve, vast valve working person adopts PTFE rubber and fluorine rubber etc. to be easy to generate the material system valve seat of plastic deformation, purpose is when two sealing surface quality of fits have error, strengthen clamping force, make valve seat produce distortion to stop up the gap and stop a leak, people call soft sealing ball valve to the ball valve of manufacturing valve seat with this class material.But be the burning-point and the fusing point of this class material lower, generally 200? below, can not the higher medium of transporting temperature.For the transporting high temperature media, have to remove to manufacture valve seat with metallic material, remove to process spheroid according to same molding surface size, make between the sealing surface and keep consistency, guarantee sealability, therefore the sealability of pressure-vessel depends on the machining accuracy of sealing surface and mutual Percent of contact area, is exactly the conformity that spheroid cooperates with the valve seat outer mold surface, and this has increased the difficulty of processing greatly.Because have out of roundness unavoidably with general apparatus processing spheroid, the valve seat of manufacturing with metal again must be the same with spheroid form, practice shows that this is difficult to reach, because valve seat processing also has error, the valve seat of metal material again can not plastic deformation, and therefore existing ball valve is difficult to reach high level sealing.In order to guarantee excellent sealing, can only importer's external equipment process, strengthened the input of enterprise, improved processing cost.
Summary of the invention
The objective of the invention is to provide for overcoming the deficiencies in the prior art that a kind of processing technology is simple, cost is low, the ball valve with composite valve seat of good seal performance and high-temperature resistant medium.
For achieving the above object, ball valve with composite valve seat provided by the invention, comprise spheroid and valve seat, it is characterized in that: described valve seat comprises a steel groove circle, described groove circle one side end face is provided with circular caulking groove, be embedded with in the described groove circle that several layers is made by steel and elastic abrasion-proof material respectively and the alternately hard of close-stacked and the valve port that soft donut is formed, relative curved surface and the spheroid sphere simultaneously with spheroid of the donut of described composition valve port is consistent.
Compared with prior art, this ball valve with composite valve seat has adopted the compound valve port of being made up of hard and soft donut, therefore has certain buffering deformation ability, when the surperficial words that do not fit like a glove with spherome surface of valve port owing to processing reason valve seat, because the pressure of medium promotion first layer hard annulus is shifted to adjacent soft annulus and has been eliminated the gap, when the unnecessary medium of seepage is pressed to second layer corrosion resistant plate while not only but also compressed second layer asbestos slate, the second layer also begins sealing, the 3rd layer successively, the 4th layer .... got rid of the gap all, increased the flow resistance of fluid at the direct leakage passage of sealed width scope internal cutting off, therefore improve sealing widely, also reduced difficulty of processing and processing cost simultaneously.
The invention will be further described below in conjunction with accompanying drawing and specific embodiment.
Description of drawings
Accompanying drawing 1 is a specific embodiment of the invention structural representation;
Accompanying drawing 2 is Fig. 1 partial enlarged drawing.
Embodiment
As shown in Figure 1, ball valve with composite valve seat comprises valve rod 1, valve body 2, spheroid 3 and valve seat.Spheroid 3 is arranged in valve body 2 inner chambers, spheroid 3 is provided with the runner of perforation, valve rod 1 penetrates in valve body 2 inner chambers and is connected with spheroid 3, valve seat is arranged on the import in valve body 2 inner chambers and exports, valve seat comprises a steel groove circle 4, groove circle 4 is the ring circles that become with the stainless steel car, groove circle 4 one side end faces are provided with circular caulking groove, opposite side be provided with valve body 2 inner chambers in import and the shoulder rank that match of outlet and being fixed in import and the outlet, as shown in Figure 2, be embedded with in the groove circle 4 that several layers is made by steel and elastic abrasion-proof material respectively and the alternately hard of close-stacked and the valve port 5 that soft donut is formed, hard and soft donut are respectively the corrosion resistant plates with same size, asbestos slate, roll into the donut of different-diameter, then asbestos slate ring and stainless steel band space cover is joined and compress, press layer by layer and be nested together, outermost is the minimum and maximum two-layer stainless steel ring that is, be pressed in the caulking groove of stainless steel circular trough circle 4 with liquid formula press machine then, donut pastes with spheroid 3 mutually with the curved surface and the consistent composition valve port 5 of spheroid 3 spheres of spheroid 3 relative one sides.In order further to improve sealability, can also several pressure springs 6 evenly be set on promptly with respect to the opposite side that is provided with donut at groove circle 4 dorsal parts and constitute elastic compression mechanisms, to increase the pressure between the sealing surface, improve sealability.Hard annulus in this ball valve with composite valve seat can be according to the difference of medium and is different, can also be other alloy as the hard annulus, and soft annulus can also be a graphite annulus etc.
Claims (3)
1. ball valve with composite valve seat, comprise spheroid and valve seat, it is characterized in that: described valve seat comprises a steel groove circle, described groove circle one side end face is provided with circular caulking groove, be embedded with in the described groove circle that several layers is made by steel and elastic abrasion-proof material respectively and the alternately hard of close-stacked and the valve port that soft donut is formed, relative curved surface and the spheroid sphere simultaneously with spheroid of the donut of described composition valve port is consistent.
2. ball valve with composite valve seat according to claim 1 is characterized in that: described hard annulus is the stainless steel annulus, and soft annulus is asbestos annulus or graphite annulus.
3. ball valve with composite valve seat according to claim 1 and 2 is characterized in that: described groove circle dorsal part evenly is provided with several pressure springs and constitutes elastic compression mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910302241A CN101539212A (en) | 2009-05-12 | 2009-05-12 | Ball valve with composite valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910302241A CN101539212A (en) | 2009-05-12 | 2009-05-12 | Ball valve with composite valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101539212A true CN101539212A (en) | 2009-09-23 |
Family
ID=41122550
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910302241A Pending CN101539212A (en) | 2009-05-12 | 2009-05-12 | Ball valve with composite valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101539212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565427A (en) * | 2015-01-17 | 2015-04-29 | 上海罕鼎阀门有限公司 | Carbon graphite valve seat component and processing method thereof |
-
2009
- 2009-05-12 CN CN200910302241A patent/CN101539212A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104565427A (en) * | 2015-01-17 | 2015-04-29 | 上海罕鼎阀门有限公司 | Carbon graphite valve seat component and processing method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090923 |