CN203906860U - Stationary hard-sealed ball valve - Google Patents
Stationary hard-sealed ball valve Download PDFInfo
- Publication number
- CN203906860U CN203906860U CN201420208872.2U CN201420208872U CN203906860U CN 203906860 U CN203906860 U CN 203906860U CN 201420208872 U CN201420208872 U CN 201420208872U CN 203906860 U CN203906860 U CN 203906860U
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- Prior art keywords
- valve
- spring
- valve seat
- valve body
- ball valve
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Abstract
The utility model discloses a stationary hard-sealed ball valve which is suitable for being used in a high-temperature or low-temperature or even ultra-low temperature work environment. The stationary hard-sealed ball valve comprises a valve body, a ball and a valve seat arranged on the valve body and matched with the ball in a sealed manner, wherein the valve seat comprises an outer circle part, an inner circle part and a middle part between the outer circle part and the inner circle part; the inner circle part is glued with the ball to form a sealing surface; the outer circle part is in contact with the valve body to form sealing; the middle part is wavelike. In the high-temperature or low-temperature situation, leakage of a fluid medium, caused by non-metal aging, can be avoided, meanwhile, the maintenance is greatly sped up, and convenience is brought for maintenance in harsh working conditions.
Description
Technical field
The utility model relates to ball valve field, especially relates to a kind of fixing hard seal ball valve that is applicable to produce continuously friction between spheroid and valve seat.
Background technique
Ball valve is a kind of compact and cut-off valve reliably, is widely used in multiple different occasion.But, under some extreme harsh application conditions, conventionally " soft " sealing adopting will be subject to certain use restriction, such as: the medium of high temperature, high pressure, abrasion, corrosivity and easily crystallization etc. all probably becomes fast and effectively " killer " of soft seal.Therefore, adopt hard sealing will contribute to address these problems.Even under the harshest service condition, such as, in the systems such as High Temperature High Pressure, high frequency action and abrasion mass transport, metal hard seal abrasion-resisting ball valve also can ensure switch freely, and moment of torsion is stable, long service life, and sealing is reliable.
Fixing hard seal ball valve is mainly used in the fields such as oil, chemical industry, iron and steel, metallurgy and electric power, and with respect to the valve of other control valve track media circulations, fixing hard seal ball valve has the advantages such as resistance of medium is little, easy to operate.
Fixing ball valve valve stand structure of hard seal in the market as shown in Figure 1, for common hard sealing structure, comprise: spheroid 1 ', valve seat 2 ' and valve body 3 ', between valve seat 2 ' and valve body 3 ', be also provided with successively valve seat insert 4 ', graphite pressure ring 5 ' and spring 6 ', between valve seat 2 ' and spheroid 1 ', form sealing surface of seat 7 ', seal ring is that shape is to suppress with Expanded graphite the annulus forming, and its cross section is square, and its inside accompanies one or more layers Stainless Steel Cloth.
This class ball valve valve seat in the time of the following temperature of 300 degree adopts graphite grazing to add metal wound gasket fire prevention, and the shortcoming that sealing mode is brought is: the porosity ratio due to graphite in ultralow temperature situation is larger, so easily cause dielectric leakage, produces larger potential safety hazard; The aging leakage that also easily causes medium of nonmetal generation under high-temperature condition, inconvenience maintenance.Such valve seat running hours under harsh operating mode in addition, sealing surface of seat is washed away continuously, can reduce its working life.
Model utility content
The purpose of this utility model is to overcome the defect of prior art, and a kind of fixing hard seal ball valve is provided, and by the intermediate portion of valve seat is designed to wavy texture, makes valve seat have elasticity, realizes the close contact of spheroid and valve seat.
For achieving the above object, the utility model proposes following technological scheme: one comprises valve body, spheroid and be arranged at the valve seat coordinating on described valve body and with described ball seal, described valve seat comprises cylindrical position, inner circle position and intermediate portion between the two, described inner circle position and the laminating of described spheroid form sealing surface, described cylindrical position contacts with described valve body and forms sealing, and described intermediate portion is wavy.
Further, be provided with spring fitting space between described valve seat and valve body, described spring fitting is provided with Regulation spring in space.
Further, described Regulation spring is positioned in described spring fitting space by spring seat, and its two ends prop up respectively spring seat and valve body.
Preferably, described Regulation spring is cylindrical spring.
Further, on described valve seat, be provided with valve seat retainer ring.
Unlike the prior art, the beneficial effects of the utility model are: the utility model both can have been avoided because of the nonmetallic aging leakage causing under high-temperature condition, the leakage that can even avoid graphite to cause greatly because of porosity ratio in ultralow temperature situation at low temperature again, greatly accelerate maintenance speed, for the maintenance of harsh operating mode brings convenience simultaneously.
Brief description of the drawings
Fig. 1 is the broken section structural representation of existing common hard seal ball valve;
Fig. 2 is the broken section structural representation of the utility model hard seal ball valve.
Reference character: 1, valve body, 2, spheroid, 3, valve seat, 31, cylindrical position, 32, intermediate portion, 33, inner circle position, 4, sealing surface, 5, Regulation spring, 6, spring seat, 7, valve seat retainer ring.
Embodiment
Below in conjunction with accompanying drawing of the present utility model, the utility model embodiment's technological scheme is carried out to clear, complete description.
The fixing hard seal ball valve of one that the utility model discloses, is suitable for even in the working environment of ultralow temperature, using at high temperature or low temperature, has good antiwear property, can realize good interior leakage sealing effect, and long service life.
As shown in Figure 2, the fixing hard seal ball valve of one that the utility model discloses, comprises valve body 1, valve seat 3, spheroid 2, Regulation spring 5 and spring seat 6, wherein, valve body 1 is three stage structure, and is sealedly and fixedly connected by flange (not shown) between every two sections.
In valve body 1, be formed with valve pocket (not shown), valve seat 3 is arranged on valve body 1 and with spheroid 2 and is sealed and matched, and valve seat 3 is mainly born the interior leakage sealing function of ball valve.It comprises cylindrical position 31, inner circle position 33 and intermediate portion between the two 32, and inner circle position 33 forms sealing surface 4 with spheroid 2 laminatings, and cylindrical position 31 contacts with valve body 1 and forms sealing.On valve seat 3, be provided with valve seat retainer ring 7.
Spheroid 2 is also arranged in the valve pocket in valve body 1, under the driving of valve rod (not shown), rotates, and realizes the opening and closing of ball valve.Spheroid 2 one end are bearing on valve seat 3, during in closed condition, in realizing, leak sealing at spheroid 2 by means of fitting tightly between spheroid 2 and valve seat 3.
Between valve seat 3 and valve body 1, be provided with spring fitting space, Regulation spring is arranged in this spring fitting space, be positioned in spring fitting space, and its two ends props up respectively spring seat 6 and valve body 1 by spring seat 6.Regulation spring 5 is that valve seat 3 forms initial sealing specific pressure with the sealing of spheroid 2, makes valve seat 3 contact tightr with spheroid 2.
Unlike the prior art, the utility model is designed to the intermediate portion of valve seat 3 32 wavy, thereby makes valve seat 3 have elasticity, and the sealing that is spheroid 2 and valve seat 3 with Regulation spring 5 actings in conjunction forms initial sealing specific pressure.Elastic force by fluid medium pressure, valve seat 3 and Regulation spring 5 compensates initial sealing specific pressure, therefore, the sealability of ball valve be improved and working life relatively long.
Technology contents of the present utility model and technical characteristics have disclosed as above; but those of ordinary skill in the art still may be based on teaching of the present utility model and announcements and are done all replacement and modifications that does not deviate from the utility model spirit; therefore; the utility model protection domain should be not limited to the content that embodiment discloses; and should comprise various do not deviate from replacement of the present utility model and modifications, and contained by present patent application claim.
Claims (5)
1. a fixing hard seal ball valve, comprise valve body, spheroid and be arranged at the valve seat coordinating on described valve body and with described ball seal, described valve seat comprises cylindrical position, inner circle position and intermediate portion between the two, described inner circle position and the laminating of described spheroid form sealing surface, described cylindrical position contacts with described valve body and forms sealing, it is characterized in that, described intermediate portion is wavy.
2. fixing hard seal ball valve according to claim 1, is characterized in that, is provided with spring fitting space between described valve seat and valve body, and described spring fitting is provided with Regulation spring in space.
3. fixing hard seal ball valve according to claim 2, is characterized in that, described Regulation spring is positioned in described spring fitting space by spring seat, and its two ends prop up respectively spring seat and valve body.
4. according to the fixing hard seal ball valve described in claim 2 or 3, it is characterized in that, described Regulation spring is cylindrical spring or helical spring.
5. fixing hard seal ball valve according to claim 1, is characterized in that, is provided with valve seat retainer ring on described valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420208872.2U CN203906860U (en) | 2014-04-25 | 2014-04-25 | Stationary hard-sealed ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420208872.2U CN203906860U (en) | 2014-04-25 | 2014-04-25 | Stationary hard-sealed ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906860U true CN203906860U (en) | 2014-10-29 |
Family
ID=51781141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420208872.2U Expired - Fee Related CN203906860U (en) | 2014-04-25 | 2014-04-25 | Stationary hard-sealed ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906860U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151574A (en) * | 2016-08-19 | 2016-11-23 | 方正阀门集团有限公司 | Ultra-low temperature ball valve valve base sealing structure |
-
2014
- 2014-04-25 CN CN201420208872.2U patent/CN203906860U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106151574A (en) * | 2016-08-19 | 2016-11-23 | 方正阀门集团有限公司 | Ultra-low temperature ball valve valve base sealing structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141029 Termination date: 20150425 |
|
| EXPY | Termination of patent right or utility model |