CN103711935A - Valve seat structure of track ball valve - Google Patents
Valve seat structure of track ball valve Download PDFInfo
- Publication number
- CN103711935A CN103711935A CN201210373941.0A CN201210373941A CN103711935A CN 103711935 A CN103711935 A CN 103711935A CN 201210373941 A CN201210373941 A CN 201210373941A CN 103711935 A CN103711935 A CN 103711935A
- Authority
- CN
- China
- Prior art keywords
- valve seat
- face
- valve
- valve base
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 26
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910002804 graphite Inorganic materials 0.000 claims abstract description 7
- 239000010439 graphite Substances 0.000 claims abstract description 7
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims abstract description 4
- 238000010276 construction Methods 0.000 claims description 7
- NKRHXEKCTWWDLS-UHFFFAOYSA-N [W].[Cr].[Co] Chemical group [W].[Cr].[Co] NKRHXEKCTWWDLS-UHFFFAOYSA-N 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000006835 compression Effects 0.000 abstract description 3
- 238000007906 compression Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
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
- F16K5/08—Details
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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
- F16K25/00—Details relating to contact between valve members and seats
- F16K25/005—Particular materials for seats or closure elements
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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
- 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
- F16K5/06—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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention provides a valve seat structure of a track ball valve which comprises a valve seat. The valve seat comprises an upper valve seat and a lower valve seat. The contact face of each of the upper valve seat and the lower valve seat is a stepped face. A soft seal ring is disposed between the stepped faces, close to the inner side, of the upper valve seat and the lower valve seat. The soft seal ring protrudes out of the seal faces of the upper valve seat and the lower valve seat. The stepped faces, close to the outer side, of the upper valve seat and the lower valve seat are fixedly connected through threads. The axial contact end face of the valve body of the upper valve seat is a stepped face, a flexible graphite seal ring is disposed between the low end face of the stepped face and the valve body, the high end face of the stepped face is parallel with the end face of the lower valve seat, and a compression gap is reserved between the high end face of the stepped face and the valve body. A groove is formed in the radial contact face of the upper valve seat and the valve body. An O-shaped ring is disposed in the groove. The upper valve seat is fixedly connected with the valve body through a pressing ring. Hard alloy is disposed at the seal face of the upper valve seat and the lower valve seat by means of surfacing. The valve seat structure adopting composite sealing is good in airtightness, zero leakage is achieved, and mounting and maintenance convenience are achieved by using the pressing ring to fix the valve seat structure.
Description
Technical field
The present invention relates to a kind of valve seat, particularly relate to a kind of valve seat construction of class of track valve.
Background technique
Orbit ball valve is widely applied in the industries such as oil, chemical industry, electric power, with making adjustments and shut-off means.Mostly the valve seat of existing class of track valve is to be embedded on valve body by interference fit, or is welded on valve body, quite loaded down with trivial details when sealing face damage need keep in repair, and wastes time and energy, and is substantially difficult to realize.And existing valve seat only adopts a kind of sealing means, i.e. hard sealing or soft seal, is not well positioned to meet the valve needs that seal steady in a long-term in production technology.
Summary of the invention
In order to overcome the above-mentioned shortcoming of existing orbit ball valve valve seat, the invention provides a kind of orbit ball valve valve seat construction, its good airproof performance, realizes zero leakage, and installation, easy to maintenance.
The technical solution adopted for the present invention to solve the technical problems is a kind of orbit ball valve valve seat construction, comprise valve seat, valve seat comprises upper valve base and lower valve base, on, surface of contact between lower valve base is ladder surface, on, between lower valve base ladder surface in the inner part, soft seal ring is set, soft seal ring evagination is in upper, lower valve base sealing surface, on, between lower valve base ladder surface in the outer part, by screw thread, be fixedly connected with, upper valve base is ladder surface with the axial end face that contacts of valve body, between ladder surface lower end face and valve body, be provided with flexible graphite sealing ring, ladder surface eminence end face and lower valve base end face, and and between valve body, leave and compress space, on the radially surface of contact of upper valve base and valve body, have groove, O type circle is set in groove, upper valve base is fixedly connected with valve body by trim ring, on, lower valve base sealing surface place pile-up welding hard alloy.
Cemented carbide is cobalt chromium tungsten cemented carbide.
Beneficial effect of the present invention is as follows:
1, valve seat is fixedly connected with valve body by trim ring, can realize the quick-replaceable of valve seat, easy to maintenance;
2, between upper valve base and valve body, both inlay O type circle, be provided with again Expanded graphite, realized double seal, guaranteed sealing good between valve seat and valve body;
3, between upper and lower valve seat ladder surface in the inner part, soft seal ring is set, soft seal ring evagination is in upper and lower sealing surface of seat, upper and lower sealing surface of seat place pile-up welding hard alloy, said structure has formed compound sealing structure, primary seal is hard sealing, inferiorly be sealed into soft seal, realized zero leakage, and worst cold case be applicable equally.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described.
Fig. 1 is the plan view of the present embodiment, is sectional view;
In Fig. 1: 1. sealing surface of seat; 2. trim ring; 3. soft seal ring; 4. upper valve base; 5. lower valve base; 6.O type circle; 7. flexible graphite sealing ring; 8. valve body; 9. compress space.
Embodiment
As shown in Figure 1, a kind of orbit ball valve valve seat construction, comprise valve seat, valve seat comprises upper valve base 4 and lower valve base 5, surface of contact between upper valve base 4 and lower valve base 5 is ladder surface, on, soft seal ring 3 is set between lower valve base ladder surface in the inner part, soft seal ring 3 evaginations are in upper, lower valve base sealing surface 1, on, between lower valve base ladder surface in the outer part, by screw thread, be fixedly connected with, upper valve base 4 is ladder surface with the axial end face that contacts of valve body 8, between ladder surface lower end face and valve body, be provided with flexible graphite sealing ring 7, ladder surface eminence end face and lower valve base 5 end face, and and between valve body 8, leave and compress space 9, on the radially surface of contact of upper valve base 4 and valve body 8, have groove, O type circle 6 is set in groove, O type circle 6 has been realized double seal with flexible graphite sealing ring 7, improved sealability, upper valve base 4 is fixedly connected with valve body 8 by trim ring 2, can realize the quick-replaceable of valve seat, easy to maintenance, on, lower valve base sealing surface 1 place's built-up welding cobalt chromium tungsten cemented carbide, wear resistance is good, formed compound seal with soft seal ring 3, good seal performance.
In the process of valve closing, sealing surface on spheroid contacts in advance with soft seal ring 3, rotation along with spheroid, soft seal ring 3 is compressed, the compression space 9 of leaving between valve seat and valve body 8 makes soft seal ring 3 have the space of enough compressions, being rotated further of spheroid, ball seal face is contacted with upper and lower sealing surface of seat 1, upper and lower sealing surface of seat 1 surface is welded with cobalt chromium tungsten cemented carbide, wear resistance is good, after sealing surface fits like a glove, valve closing, has realized zero leakage sealing.
Claims (2)
1. an orbit ball valve valve seat construction, comprise valve seat, it is characterized in that: described valve seat comprises upper valve base and lower valve base, on, surface of contact between lower valve base is ladder surface, on, between lower valve base ladder surface in the inner part, soft seal ring is set, described soft seal ring evagination is in upper, lower valve base sealing surface, on, between lower valve base ladder surface in the outer part, by screw thread, be fixedly connected with, described upper valve base is ladder surface with the axial end face that contacts of valve body, between ladder surface lower end face and valve body, be provided with flexible graphite sealing ring, ladder surface eminence end face and lower valve base end face, and and between valve body, leave and compress space, on the radially surface of contact of described upper valve base and valve body, have groove, O type circle is set in groove, described upper valve base is fixedly connected with valve body by trim ring, on described, lower valve base sealing surface place pile-up welding hard alloy.
2. a kind of orbit ball valve valve seat construction according to claim 1, is characterized in that: described cemented carbide is cobalt chromium tungsten cemented carbide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210373941.0A CN103711935B (en) | 2012-10-05 | 2012-10-05 | A kind of valve seat structure of track ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210373941.0A CN103711935B (en) | 2012-10-05 | 2012-10-05 | A kind of valve seat structure of track ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103711935A true CN103711935A (en) | 2014-04-09 |
| CN103711935B CN103711935B (en) | 2017-03-29 |
Family
ID=50405157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210373941.0A Active CN103711935B (en) | 2012-10-05 | 2012-10-05 | A kind of valve seat structure of track ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103711935B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268574A (en) * | 2018-11-05 | 2019-01-25 | 江苏圣泰阀门有限公司 | A kind of novel soft sealing ball valve |
| CN113586754A (en) * | 2021-07-30 | 2021-11-02 | 清华大学 | Forced sealing valve seat |
| 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 (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4085770A (en) * | 1975-12-05 | 1978-04-25 | Woronowicz R | Seat and trunnion assemblies for rotary valves |
| EP0378520A1 (en) * | 1989-01-13 | 1990-07-18 | F.I.P. Formatura Iniezione Polimeri S.P.A. | Ball valve with bi-directional lock ring |
| CN2689000Y (en) * | 2004-02-24 | 2005-03-30 | 陈普庆 | Soft and hard sealed eccentric semi-ball valves |
| RU2302574C1 (en) * | 2005-11-22 | 2007-07-10 | Общество с ограниченной ответственностью "Завод "Газпроммаш" | Globe valve |
| CN201531642U (en) * | 2009-11-09 | 2010-07-21 | 上海开维喜阀门集团有限公司 | Pipe line and ball valve combined seal valve seat |
| CN102486236A (en) * | 2010-12-03 | 2012-06-06 | 浙江正华阀门厂 | Triple seal pipeline ball valve for integrated elastic metal valve seat |
| CN202867913U (en) * | 2012-10-05 | 2013-04-10 | 上海神通企业发展有限公司 | Valve seat structure of track ball valve |
-
2012
- 2012-10-05 CN CN201210373941.0A patent/CN103711935B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4085770A (en) * | 1975-12-05 | 1978-04-25 | Woronowicz R | Seat and trunnion assemblies for rotary valves |
| EP0378520A1 (en) * | 1989-01-13 | 1990-07-18 | F.I.P. Formatura Iniezione Polimeri S.P.A. | Ball valve with bi-directional lock ring |
| CN2689000Y (en) * | 2004-02-24 | 2005-03-30 | 陈普庆 | Soft and hard sealed eccentric semi-ball valves |
| RU2302574C1 (en) * | 2005-11-22 | 2007-07-10 | Общество с ограниченной ответственностью "Завод "Газпроммаш" | Globe valve |
| CN201531642U (en) * | 2009-11-09 | 2010-07-21 | 上海开维喜阀门集团有限公司 | Pipe line and ball valve combined seal valve seat |
| CN102486236A (en) * | 2010-12-03 | 2012-06-06 | 浙江正华阀门厂 | Triple seal pipeline ball valve for integrated elastic metal valve seat |
| CN202867913U (en) * | 2012-10-05 | 2013-04-10 | 上海神通企业发展有限公司 | Valve seat structure of track ball valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109268574A (en) * | 2018-11-05 | 2019-01-25 | 江苏圣泰阀门有限公司 | A kind of novel soft sealing ball valve |
| CN113586754A (en) * | 2021-07-30 | 2021-11-02 | 清华大学 | Forced sealing valve seat |
| CN113586754B (en) * | 2021-07-30 | 2022-04-22 | 清华大学 | Forced sealing valve seat |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103711935B (en) | 2017-03-29 |
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