CN201034181Y - Hard-sealing ball valve seat structure - Google Patents
Hard-sealing ball valve seat structure Download PDFInfo
- Publication number
- CN201034181Y CN201034181Y CNU2007200371806U CN200720037180U CN201034181Y CN 201034181 Y CN201034181 Y CN 201034181Y CN U2007200371806 U CNU2007200371806 U CN U2007200371806U CN 200720037180 U CN200720037180 U CN 200720037180U CN 201034181 Y CN201034181 Y CN 201034181Y
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- valve
- sealing surface
- ball
- valve seat
- utility
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Abstract
The utility model discloses a valve base structure for a hard sealing ball valve, comprising a body and a valve ball. The joint place of the body and the valve ball is a sealing surface. The utility model is characterized in that a groove arranged along the circumferential direction on at least one lateral face of two neighboring lateral faces of the sealing surface. When the valve is closed, the average diameter of the sealing surface is corresponding to the average diameter when the valve is opened, the change rate is 0.001% to 0.2%. The utility model has the advantages that the groove enables the valve base deform elastically as the deformation of the valve ball and enables the sealing surface of the valve base and the valve ball always stick together, overcoming the defect that sphere deformation can easily cause the leakage of the valve.
Description
Technical field
The utility model relates to a kind of valve seat of valve, is specifically related to a kind of valve seat construction that is used on the hard seal ball valve.
Background technique
In industries such as metallurgy, chemical industry, oil, food, medicine, all on hydraulic pipe line or fluid foods conveyance conduit, ball valve is set usually.Ball valve with its opening and closing rapidly, characteristics such as good seal performance and generally being adopted.
The basic structure of existing ball valve is: a ball is set in the inner chamber of valve body, and when valve was in opening state, the through hole in the middle of the ball was communicated with the import and export at valve gap two ends, i.e. a section in the through hole formation pipeline; When closing, drive the ball half-twist by the top valve rod, make the center line of through hole and pipeline orthogonal, with the sphere that the spheroid both sides are smooth pipeline is blocked, be provided with pressure ring and valve seat in the valve gap, the faying surface of valve seat and spheroid constitutes sealing surface, and the sealing effect of its sealing surface is the key of valve performance.
Find in actual use, behind the valve closing, because the effect of valve downstream pipeline pressure, the spheroid of ball valve has born very big pressure medium, under the effect of pressure, with the resiliently deformable that produces to a certain degree, owing to offer through hole in the middle of the spheroid, resiliently deformable is in whole sealing surface of seat position uneven distribution, and the distortion of through hole oral area is bigger, and other position is less relatively, the trend of resiliently deformable is: ball seal face and sealing surface of seat are broken away from mutually, because valve seat is that rigid material is made, and can't be out of shape with spheroid, thereby will be easy to cause the leakage of valve.
Summary of the invention
The utility model purpose provides a kind of certain flexible valve seat construction that has, and can effectively improve the sealability of valve.
For achieving the above object, the technical solution adopted in the utility model is: a kind of hard seal ball valve valve seat construction, comprise a body, the joint place of this body and valve ball is a sealing surface, on described body, in the adjacent bi-side of described sealing surface, be provided with the groove of a circumferential arrangement at least one side, under the valve closes state, the average diameter of described sealing surface is corresponding to the average diameter in the open mode lower sealing surface, and its variance ratio is 0.001%～0.2%.
In the technique scheme, described sealing surface is fitted to contact with valve seat by valve ball and is formed, the adjacent bi-side of sealing surface are respectively the interior edge face of the nearly ball end of valve seat body and form the madial wall of a fluid passage part, described groove circumferentially is distributed in corresponding interior edge face, on the one side in the madial wall, make the smooth surface and sealing surface of seat applying of spheroid when the rotation valve ball after, valve closing, valve ball is when being subjected to the pressure medium distortion, valve seat is just by the generation resiliently deformable of groove, the position of groove, it is that to make the average diameter variance ratio at sealing surface place be 0.001%～0.2% that the selection of the width and the degree of depth should make its excursion, valve seat is all changed with valve ball in circumferential sealing surface everywhere, keep sealing surface and sphere to fit, guarantee that valve has excellent sealing performance.
Preferred scheme is that described groove radially is opened on the madial wall of described body.
Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:
1, since the utility model by on valve seat, offering groove, when valve closing, valve seat can be with valve ball distortion generation distortion within the specific limits, the sealing surface of valve seat is fitted with ball surface all the time, form good circumferential seal face, remedy the shortcoming that is easy to generate valve leak owing to the spheroid distortion;
2, the utility model is simple in structure, is easy to realize.
Description of drawings
Accompanying drawing 1 is the utility model embodiment one a partial schematic sectional view;
Accompanying drawing 2 is the utility model embodiment two a partial schematic sectional view.
Wherein: 1, body; 2, valve ball; 3, sealing surface; 4, interior edge face; 5, groove; 6, madial wall.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: shown in accompanying drawing 1, a kind of hard seal ball valve valve seat construction comprises a body 1, and the joint place of this body and valve ball 2 is a sealing surface 3, on described body, in the adjacent side of described sealing surface, radially be provided with the groove 5 of a circumferential arrangement on the madial wall 6, constitute elasticity procheilon structure; Under the valve closes state, the distortion of groove makes the average diameter of described sealing surface corresponding to the average diameter in the original state lower sealing surface, forms 0.08% variance ratio (deformation rate).
When the valve rod in the ball valve rotates valve ball, after making the smooth surface and sealing surface of seat applying of spheroid, valve is in closed condition, random distortion will take place with the pressure of medium in the valve ball 2, at this moment, valve seat makes valve seat all change with valve ball in circumferential sealing surface everywhere by the groove 5 generation resiliently deformable of (be deformation rate scope in) within the specific limits, and keep sealing surface and sphere applying sealing, guarantee that all the time valve has excellent sealing performance.
Embodiment two: shown in accompanying drawing 2, a kind of hard seal ball valve valve seat construction comprises a body 1, and the joint place of this body and valve ball 2 is a sealing surface 3, on described body, in the adjacent side of described sealing surface, axially offer the groove 5 of a circumferential arrangement on the interior edge face 4, constitute elasticity procheilon structure; Under the valve closes state, the distortion of groove makes the average diameter of described sealing surface corresponding to the average diameter in the original state lower sealing surface, forms 0.12% variance ratio (deformation rate).
Claims (2)
1. hard seal ball valve valve seat construction, comprise a body [1], the joint place of this body and valve ball [2] is sealing surface [3], it is characterized in that: the groove [5] that on described body, in the adjacent bi-side of described sealing surface, is provided with a circumferential arrangement at least one side, under the valve closes state, the average diameter of described sealing surface is corresponding to the average diameter in the open mode lower sealing surface, and its variance ratio is 0.001%～0.2%.
2. hard seal ball valve valve seat construction according to claim 1 is characterized in that: described groove [5] radially is opened on the madial wall [6] of described body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200371806U CN201034181Y (en) | 2007-04-28 | 2007-04-28 | Hard-sealing ball valve seat structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200371806U CN201034181Y (en) | 2007-04-28 | 2007-04-28 | Hard-sealing ball valve seat structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034181Y true CN201034181Y (en) | 2008-03-12 |
Family
ID=39195072
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200371806U Expired - Lifetime CN201034181Y (en) | 2007-04-28 | 2007-04-28 | Hard-sealing ball valve seat structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201034181Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758932A (en) * | 2012-07-18 | 2012-10-31 | 嘉士凯（苏州）阀门配件有限公司 | High-temperature-resistant ball valve |
| CN105074300A (en) * | 2013-03-25 | 2015-11-18 | 新确有限公司 | Seal valve and method for manufacturing same |
| CN110440022A (en) * | 2019-08-23 | 2019-11-12 | 江苏神通阀门股份有限公司 | A kind of dual-seal high temperature and pressure elastic ball valve valve seat construction |
| KR102331430B1 (en) * | 2021-03-09 | 2021-12-01 | 주식회사 동산밸브 | Orbit ball valve with improved sealing performance |
-
2007
- 2007-04-28 CN CNU2007200371806U patent/CN201034181Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758932A (en) * | 2012-07-18 | 2012-10-31 | 嘉士凯（苏州）阀门配件有限公司 | High-temperature-resistant ball valve |
| CN105074300A (en) * | 2013-03-25 | 2015-11-18 | 新确有限公司 | Seal valve and method for manufacturing same |
| CN105074300B (en) * | 2013-03-25 | 2017-07-07 | 新确有限公司 | Sealing valve and its manufacture method |
| CN110440022A (en) * | 2019-08-23 | 2019-11-12 | 江苏神通阀门股份有限公司 | A kind of dual-seal high temperature and pressure elastic ball valve valve seat construction |
| KR102331430B1 (en) * | 2021-03-09 | 2021-12-01 | 주식회사 동산밸브 | Orbit ball valve with improved sealing performance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 215129 No. 999, Xiangjiang Road, New District, Jiangsu, Suzhou Patentee after: Neway Valve (Suzhou) Co., Ltd. Address before: 215129 No. 999, Xiangjiang Road, New District, Jiangsu, Suzhou Patentee before: Suzhou Neway Valve Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20080312 |
|
| CX01 | Expiry of patent term |