CN201034184Y - Standing ball valve seat structure - Google Patents
Standing ball valve seat structure Download PDFInfo
- Publication number
- CN201034184Y CN201034184Y CNU2007200392889U CN200720039288U CN201034184Y CN 201034184 Y CN201034184 Y CN 201034184Y CN U2007200392889 U CNU2007200392889 U CN U2007200392889U CN 200720039288 U CN200720039288 U CN 200720039288U CN 201034184 Y CN201034184 Y CN 201034184Y
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- valve seat
- valve
- seat body
- sealing
- seal
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Abstract
The utility model discloses a fixing ball valve seat structure, which comprises a valve seat body, a pretensioned spring positioned on the valve seat body, a sealing ring arranged on the internal end face of the vale seat body at the spheroidal sealing and a spheroidal sealing surface formed by the spheroidal surface. The utility model is characterized in that a piston ring is arranged between the valve seat body and the valve body, the piston ring is glidingly sleeved on the valve body, a first sealing ring is positioned between the piston ring and the valve body, and a second sealing ring is arranged between the piston ring and the valve seat body. The first sealing ring and the sealing surface of the valve body are positioned at the axial outer side of the spheroidal sealing surface, while the second sealing ring and the sealing surface of the valve seat body are arranged at the axial inner side of the spheroidal sealing surface. The utility model makes use of the ubiety between the sealing surfaces at both sides of the piston ring and the spheroidal sealing surface, increases the compressed area to counteract the hydraulic pressure in the compressing area, enabling the vale seat keep good sealing condition with the ball under the action of hydraulic pressure in all directions.
Description
Technical field
The utility model relates to a kind of fixing ball valve, is specifically related to a kind of valve seat construction of sealing between spheroid and the valve body of being used for.
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 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.
In general, be equipped with preloading spring in the valve seat, be used for valve seat is produced pretightening force, the sealing surface of valve seat and spherome surface are fitted tightly, realize the excellent sealing of ball valve.But find during actual the use, when if the upstream valve seat takes place to leak, the band hydraulic fluid will enter valve pocket, promote the downstream valve seat, thereby produce on a plurality of directions thrust (the inside and outside both sides of sealing surface all are under pressure) to valve seat, promptly, in the prior art structure, concerning valve seat, hydrodynamic pressure in the pretightening force of preloading spring and the pipeline can make valve seat and ball seal, and the hydrodynamic pressure of upstream valve seat leakage then can influence the sealing of valve seat and spheroid, causes the decline of sealability thus, may cause the leakage phenomenon between valve seat and spheroid, influence the normal use of ball valve.
Summary of the invention
The utility model purpose provides a kind of valve seat of fixed ball valve structure, by the improvement to valve seat construction, the sealing effect between valve seat and spheroid is improved, and effectively prevents to leak.
For achieving the above object, the technical solution adopted in the utility model is: a kind of valve seat of fixed ball valve structure, comprise a valve seat body, the valve seat body is provided with preloading spring, be provided with seal ring with the valve seat body interior edge face at ball seal place, constitute the ball seal face with spherome surface, be provided with piston ring between described valve seat body and the valve body, this piston ring sliding sleeve is on described valve seat body, be provided with first seal ring between described piston ring outer wall and the valve body, be provided with second seal ring between piston ring inwall and the valve seat body, the sealing surface of described first seal ring and valve body is positioned at the radial outside of described ball seal face, and the sealing surface of second seal ring and valve seat body is positioned at the radially inner side of described ball seal face.
In the technique scheme, valve seat is set between spheroid and the valve body, and valve seat and spheroid contacting point are provided with seal ring, the sealing surface of formation and spheroid is provided with preloading spring in the valve seat, this spring outer end is butted on the valve body, the inner is butted on the valve seat, for the sealing surface between valve seat and the spheroid provides pretightening force; Described piston ring is between valve seat body and valve body, and " sealing surface of first seal ring and valve body is positioned at the radial outside of described ball seal face ", " sealing surface of second seal ring and valve seat body is positioned at the radially inner side of described ball seal face ", thereby when pressure comes from the valve seat interior edge face, the sectional area that is pressed into the end of exerting pressure is valve seat interior edge face (being that the valve seat outer side wall is to the area between the ball seal face), fluid is pressed into the valve seat that is positioned at the preloading spring place and the slit between valve body through the gap between valve seat body outer side wall and the valve body, piston ring is pushed open, make compression area become sealing surface place from valve seat outer side wall to the second seal ring, according to power=pressure * area, with under the pressure, lifting surface area is big more, power is also big more, so the pressure of piston ring side is pressed on the spherome surface valve seat greater than the pressure on the valve seat interior edge face (sealing surface of second seal ring is positioned at the radially inner side of ball seal face); And when pressure comes from the valve seat madial wall, application of force area is that the valve seat madial wall is to ball seal face place, and compression area is the sealing surface place of valve seat body madial wall to the first seal ring, compression area is greater than the area of exerting pressure (sealing surface of first seal ring is positioned at the radial outside of ball seal face), the hydraulic pressure of compression-side makes the valve seat body be close to spherome surface, forms good sealing effect.
Optimized technical scheme is provided with the water conservancy diversion duct between described piston ring and the described valve seat body.Thus, when pressure came in the valve seat interior edge face, the liquid of infiltration can enter the water conservancy diversion duct, thereby guaranteed that piston ring is pushed to the outside.
In the technique scheme, offer on the described valve seat be communicated with hole for injecting glue on valve pocket and the valve body lead the glue passage, this outlet of leading the glue passage is positioned at the radially inner side of described ball seal face.When accident appears in the sealing of seal ring, can sealer be injected valve seat and ball seal face place by hole for injecting glue, to realize interim urgent sealing.
Further technological scheme is, described leading between the axial outside of glue passage, described valve seat body and the valve body is provided with the 3rd seal ring, leaks to the valve seat outside to prevent to inject the seal gease of leading in the glue passage, avoids waste.
In the technique scheme, be positioned at the axial outside of first, second seal ring on the described piston ring, be provided with a pair of respectively with the graphite circle of described valve seat body, valve seal, when the seal ring of inboard suffered that fire is destroyed, resistant to elevated temperatures graphite circle still can guarantee sealing.
Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:
1, because the utility model is provided with piston ring between valve seat body and valve body, utilize second seal ring of piston ring and valve seat body sealing and the relative position of ball seal ring, and the relative position relation of first seal ring of piston ring and valve seal and ball seal interannular, make hydraulic pressure in the valve pocket to the area of exerting pressure of valve seat always less than the compression area between valve seat and valve body, thereby under same pressure the pressure of compression-side greater than the pressure of the side of exerting pressure, promptly and the valve seat body is pressed in spherome surface by hydraulic pressure, form good sealing effect;
2, the utility model valve seat body be provided be communicated with the valve body hole for injecting glue lead the glue duct, when accident appears in the sealing of seal ring, can sealer be injected valve seat and ball seal face place by hole for injecting glue, to realize interim urgent sealing, simultaneously leading axial arranged outside the 3rd seal ring in glue duct, to prevent leaking of seal gease, can avoid waste;
3, at the axial arranged outside twice graphite circle of first, second seal ring, when the seal ring of inboard suffered that fire is destroyed, resistant to elevated temperatures graphite circle still can guarantee sealing.
Description of drawings
Accompanying drawing 1 is the new embodiment's one of this practicality a partial structurtes schematic representation.
Wherein: 1, valve seat body; 2, spheroid; 3, valve body; 4, seal ring; 5, preloading spring; 6, piston ring; 7, first seal ring; 8, second seal ring; 10, hole for injecting glue; 11, graphite circle; 12, the 3rd seal ring.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: shown in accompanying drawing 1, a kind of valve seat of fixed ball valve structure, comprise a valve seat body 1, the valve seat body is provided with preloading spring 5, be provided with seal ring 4 with the valve seat body interior edge face at ball seal place, constitute the ball seal face with spheroid 2 surfaces, be provided with piston ring 6 between described valve seat body and the valve body 3, this piston ring sliding sleeve is on described valve seat body, be provided with first seal ring 7 between described piston ring outer wall and the valve body, be provided with second seal ring 8 between piston ring inwall and the valve seat body, the sealing surface of described first seal ring and valve body is positioned at the radial outside of described ball seal face, and the sealing surface of second seal ring and valve seat body is positioned at the radially inner side of described ball seal face; Be positioned at the axial outside of first, second seal ring on the piston ring, be provided with a pair of respectively with the graphite circle 11 of described valve seat body, valve seal, when the seal ring of inboard suffered that fire is destroyed, resistant to elevated temperatures graphite circle still can guarantee sealing.
In the present embodiment, offer on the described valve seat be communicated with hole for injecting glue 10 on valve pocket and the valve body lead the glue passage, this outlet of leading the glue passage is positioned at the radially inner side of described ball seal face, in the axial outside of leading the glue passage, also be provided with the 3rd seal ring 12 between described valve seat body and the valve body, when accident appears in the sealing of seal ring, can sealer be injected valve seat and ball seal face place by hole for injecting glue, to realize interim urgent sealing, utilize the sealing of the 3rd seal ring and valve body simultaneously, prevent leaking of seal gease, avoid waste.
When work, shown in accompanying drawing 1, when the face of exerting pressure is left end, the area of exerting pressure is that the valve seat upper side wall is to the area between the ball seal face, fluid is pressed into valve seat and the slit between valve body (being guide channel) that is positioned at the preloading spring place through the gap between valve seat body upper side wall and the valve body, piston ring is pushed open to the right, after entering, fluid make compression area become sealing surface place from valve seat upper side wall to the second seal ring, according to power=pressure * area, with under the pressure, lifting surface area is greater than the area of exerting pressure, so right atrial pressure is greater than left side pressure, hydraulic pressure is pressed in valve seat on the spherome surface, forms sealing;
And when pressure comes from the valve seat madial wall (valve seat lower wall), application of force area is that the valve seat lower wall is to ball seal face place, fluid flow to the right side of piston ring through leading the glue passage, the promotion piston ring moves to left, thereby make compression area become the sealing surface place of valve seat body lower wall to the first seal ring, compression area is greater than the area of exerting pressure, and right side hydraulic pressure is greater than left side hydraulic pressure, make the valve seat body be close to spherome surface, form sealing.
Embodiment two: a kind of valve seat of fixed ball valve structure, and its main structure is identical with embodiment one, and difference is to offer groove on the piston ring side adjacent with described valve seat body, formation water conservancy diversion pore passage structure.
Claims (5)
1. valve seat of fixed ball valve structure, comprise a valve seat body [1], the valve seat body is provided with preloading spring [5], be provided with seal ring [4] with the valve seat body interior edge face at ball seal place, constitute the ball seal face with spheroid [2] surface, it is characterized in that: be provided with piston ring [6] between described valve seat body and the valve body, this piston ring sliding sleeve is on described valve seat body, be provided with first seal ring [7] between described piston ring outer wall and the valve body, be provided with second seal ring [8] between piston ring inwall and the valve seat body, the sealing surface of described first seal ring and valve body [3] is positioned at the radial outside of described ball seal face, and the sealing surface of second seal ring and valve seat body is positioned at the radially inner side of described ball seal face.
2. valve seat of fixed ball valve structure according to claim 1 is characterized in that: be provided with the water conservancy diversion duct between described piston ring and the described valve seat body.
3. valve seat of fixed ball valve structure according to claim 1 is characterized in that: offer on the described valve seat be communicated with hole for injecting glue [10] on valve pocket and the valve body lead the glue passage, this outlet of leading the glue passage is positioned at the radially inner side of described ball seal face.
4. valve seat of fixed ball valve structure according to claim 3 is characterized in that: described leading between the axial outside of glue passage, described valve seat body and the valve body is provided with the 3rd seal ring [12].
5. valve seat of fixed ball valve structure according to claim 1 is characterized in that: be positioned at the axial outside of first, second seal ring on the described piston ring, be provided with a pair of respectively with the graphite circle [11] of described valve seat body, valve seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200392889U CN201034184Y (en) | 2007-06-01 | 2007-06-01 | Standing ball valve seat structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200392889U CN201034184Y (en) | 2007-06-01 | 2007-06-01 | Standing ball valve seat structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201034184Y true CN201034184Y (en) | 2008-03-12 |
Family
ID=39195075
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200392889U Expired - Fee Related CN201034184Y (en) | 2007-06-01 | 2007-06-01 | Standing ball valve seat structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201034184Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629388A (en) * | 2013-11-27 | 2014-03-12 | 凯喜姆阀门有限公司 | Low-temperature fixed ball valve |
| CN103821962A (en) * | 2014-03-10 | 2014-05-28 | 重庆海王仪器仪表有限公司 | Noise reduction ball valve |
| CN104482244A (en) * | 2014-12-24 | 2015-04-01 | 四川精控阀门制造有限公司 | Bidirectional sealing valve seat structure and ultralow temperature top-assembled fixed ball valve |
-
2007
- 2007-06-01 CN CNU2007200392889U patent/CN201034184Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103629388A (en) * | 2013-11-27 | 2014-03-12 | 凯喜姆阀门有限公司 | Low-temperature fixed ball valve |
| CN103629388B (en) * | 2013-11-27 | 2017-01-25 | 凯喜姆阀门有限公司 | Low-temperature fixed ball valve |
| CN103821962A (en) * | 2014-03-10 | 2014-05-28 | 重庆海王仪器仪表有限公司 | Noise reduction ball valve |
| CN104482244A (en) * | 2014-12-24 | 2015-04-01 | 四川精控阀门制造有限公司 | Bidirectional sealing valve seat structure and ultralow temperature top-assembled fixed ball valve |
| CN104482244B (en) * | 2014-12-24 | 2017-11-21 | 四川精控阀门制造有限公司 | Formula fixing ball valve is filled on two way seal valve seat construction and ultralow temperature |
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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. |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080312 Termination date: 20160601 |