CN203477427U - Fireproof ball valve - Google Patents
Fireproof ball valve Download PDFInfo
- Publication number
- CN203477427U CN203477427U CN201320612626.9U CN201320612626U CN203477427U CN 203477427 U CN203477427 U CN 203477427U CN 201320612626 U CN201320612626 U CN 201320612626U CN 203477427 U CN203477427 U CN 203477427U
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- CN
- China
- Prior art keywords
- valve
- seal
- grease
- seal surface
- sealing surface
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to a fireproof ball valve. The fireproof ball valve comprises a valve body, a ball body, a valve cover, a valve rod and a valve base, a seal surface of the valve base is of a dual seal structure composed of a soft seal surface and a hard seal surface, the soft seal surface is formed by installing a PTFE plastic seal ring inside a valve base supporting ring in an embedded mode, the hard seal surface is formed by manufacturing a seal surface matched with the ball body on the position, on the inner side of the PTFE plastic seal ring, of the valve base supporting ring, the valve base is of a floating structure, a grease-injected seal cavity is manufactured in the position, on the inner side of the hard seal surface, of the valve base supporting ring, and the grease-injected seal cavity is communicated with a grease injection valve on the valve body through a grease injection channel inside the valve base supporting ring. When the soft seal surface is damaged in a fire disaster and other accidents, seal grease is injected into the grease-injected seal cavity through the grease injection valve, and the grease-injected seal cavity is matched with the hard seal surface to seal the ball body simultaneously. The fireproof ball valve has the advantages of being reliable in seal performance, good in fireproof performance, and the like, and is suitable for control valves of petroleum and natural gas pipelines.
Description
Technical field
The utility model relates to valve field, particularly about a kind of ball valve.The utility model is applicable to the control valve of oil, natural gas line.
Background technique
Fire-proof ball valve generally comprises valve body, spheroid, valve gap, valve rod, valve seat, sealing surface of seat forms double sealing structure by hard sealing surface and soft sealing face, hard sealing surface is generally manufactured a sealing surface cooperatively interacting with spheroid on valve seat bearing ring, in normal working by soft sealing face and spheroid fitted seal, during breaking out of fire, soft sealing face is burnt, and by hard sealing surface and spheroid fitted seal, continues to play seal action.Major defect is that the hard sealing surface on valve seat bearing ring easily adheres to medium impurity when normal use, and after soft sealing face is burnt, being sealed and matched between spheroid and hard sealing surface is not tight, is prone to leakage, and fireproof performance is poor.
Summary of the invention
The purpose of this utility model is the shortcoming existing for prior art, seals reliably the fire-proof ball valve that fireproof performance is good when a kind of breaking out of fire is provided.
The technical solution of the utility model comprises valve body, spheroid, valve gap, valve rod, valve seat, sealing surface of seat forms double sealing structure by soft sealing face and hard sealing surface, soft sealing face adopts PTFE plastic seal ring to be inlaid in valve seat bearing ring, hard sealing surface adopts on the valve seat bearing ring of PTFE plastic seal ring inner side manufactures a sealing surface coordinating with spheroid, valve seat adopts floating structure, be to be mainly shaped with greasing Seal cage on the valve seat bearing ring of hard sealing surface inner side, this greasing Seal cage is communicated with the grease pouring valve on valve body by the greasing passage in valve seat bearing ring.
The utility model has the advantages that on the valve seat bearing ring of hard sealing surface inner side and be shaped with greasing Seal cage, when the contingency damage soft sealing faces such as breaking out of fire, grease pouring valve injects greasing Seal cage by seal gease, coordinates hard sealing surface simultaneously and ball seal, improves sealability and fireproof performance.
Accompanying drawing explanation
Fig. 1 is sealed structural representation of the present utility model.
Embodiment
Fire-proof ball valve as shown in Figure 1, comprise valve body 5, spheroid 1, valve gap, valve rod, valve seat, sealing surface of seat forms double sealing structure by soft sealing face 3 and hard sealing surface 7, soft sealing face 3 adopts PTFE plastic seal ring to be inlaid in valve seat bearing ring 4, hard sealing surface 7 adopts on the valve seat bearing ring 4 of PTFE plastic seal ring inner side manufactures a sealing surface coordinating with spheroid, valve seat adopts floating structure, the valve seat back side and valve body 5 passages radially between step along valve body 5 passage axis direction mounting spring 8, on the valve seat bearing ring 4 of hard sealing surface 7 inner sides, be shaped with greasing Seal cage 2, this greasing Seal cage 2 is communicated with the grease pouring valve 6 on valve body 5 by the greasing passage in valve seat bearing ring 4.When the contingency damage soft sealing faces 3 such as breaking out of fire, grease pouring valve 6 injects greasing Seal cage 2 by seal gease, coordinates hard sealing surface 7 to seal with spheroid 1 simultaneously.
Claims (1)
1. a fire-proof ball valve, comprise valve body (5), spheroid (1), valve gap, valve rod, valve seat, sealing surface of seat forms double sealing structure by soft sealing face (3) and hard sealing surface (7), soft sealing face (3) adopts PTFE plastic seal ring to be inlaid in valve seat bearing ring (4), hard sealing surface (7) adopts the upper sealing surface coordinating with spheroid of manufacturing of the valve seat bearing ring (4) in PTFE plastic seal ring inner side, valve seat adopts floating structure, it is characterized in that being shaped with greasing Seal cage (2) on the valve seat bearing ring (4) of hard sealing surface (7) inner side, this greasing Seal cage (2) is communicated with the grease pouring valve (6) on valve body (5) by the greasing passage in valve seat bearing ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320612626.9U CN203477427U (en) | 2013-09-25 | 2013-09-25 | Fireproof ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320612626.9U CN203477427U (en) | 2013-09-25 | 2013-09-25 | Fireproof ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203477427U true CN203477427U (en) | 2014-03-12 |
Family
ID=50225758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320612626.9U Expired - Fee Related CN203477427U (en) | 2013-09-25 | 2013-09-25 | Fireproof ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203477427U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221786A (en) * | 2015-10-26 | 2016-01-06 | 大连福佳·大化石油化工有限公司 | Soft or hard double-seal ball valve |
| CN107588207A (en) * | 2017-10-30 | 2018-01-16 | 中国五环工程有限公司 | Fire-type ball valve |
-
2013
- 2013-09-25 CN CN201320612626.9U patent/CN203477427U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221786A (en) * | 2015-10-26 | 2016-01-06 | 大连福佳·大化石油化工有限公司 | Soft or hard double-seal ball valve |
| CN107588207A (en) * | 2017-10-30 | 2018-01-16 | 中国五环工程有限公司 | Fire-type ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140312 Termination date: 20140925 |
|
| EXPY | Termination of patent right or utility model |