CN201973269U - Triple eccentric hard seal plug valve - Google Patents
Triple eccentric hard seal plug valve Download PDFInfo
- Publication number
- CN201973269U CN201973269U CN2011201196232U CN201120119623U CN201973269U CN 201973269 U CN201973269 U CN 201973269U CN 2011201196232 U CN2011201196232 U CN 2011201196232U CN 201120119623 U CN201120119623 U CN 201120119623U CN 201973269 U CN201973269 U CN 201973269U
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- Prior art keywords
- valve
- valve body
- gland
- spool
- sealing
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Abstract
The utility model relates to a triple eccentric hard seal plug valve. The valve comprises a valve body (1), a valve core (2), a valve rod (6), a valve cap (11) arranged on the valve body, a pressing plate (7), a filler gland (10) and a pivot shaft (9) which is arranged at the bottom end of the valve core, wherein a gear box (12) driving the valve core (2) to rotate is arranged on the valve body (1) and is fixedly connected with the filler gland (10); the valve core (2) adopts a triple eccentric structure and is arranged in the valve body (1) through the valve rod (6) and the pivot shaft (9); the valve rod (6) passes through the filler gland (10) and is connected with the gear box (12); and a sealing ring (8) is also arranged between the valve body (1) and the valve cap (11). Because the design of the triple eccentric structure is adopted in the valve core (2), the friction travel between the valve core (2) and the sealing ring (8) is reduced, the service life is prolonged, and the opening and closing operating torque of the valve is reduced; and because elastic seal is adopted between the valve core (2) and the sealing ring (8), the sealing reliability and the sealing level are improved, and zero leakage is achieved.
Description
Technical field
The utility model relates to a kind of valve, especially relate to the structure of a kind of three eccentric hard sealing stopcocks.
Background technique
Plug valve is the rotary valve of closure member or plunger shape, and to turn 90 degrees the passway that makes on the valve plug identical with the passway on the valve body or separate by revolving, and realizes a kind of valve of opening or closing.It is cylindrical or conical that the shape of the valve plug of stopcock can become.In cylindrical valve plug, passage generally becomes rectangle; And in cone-shaped valve plug, passage in echelon.These shapes become lightly the structure of stopcock, but have also produced certain loss simultaneously.Stopcock is suitable for being suitable for as cutting off and connect medium and shunting most, but according to the character that is suitable for and the abrasion-resistance of sealing surface, also can be used for throttling sometimes.It because motion has wiping action between the stopcock sealing surface, and when standard-sized sheet, can prevent fully and the contacting of flowing medium, so also can be used to the medium with suspended particulate usually.It is easy to adapt to multi-channel structure during another key property of stopcock, so that a valve can obtain two, three, even four different runners.Can simplify some connection fittings that need in design, minimizing valve consumption and the equipment of pipe-line system like this.
Stopcock is widely used in every field such as oil, chemical industry, iron and steel, metallurgy and electric power, and be by the sealing of conical surface pressure fitted between the spool of existing stopcock and the valve body, this sealing is worn and torn easily, switch number of times more than, time leaks once long, and the operation torque ratio is bigger.
The model utility content
At the deficiency that exists on the prior art, the utility model purpose is to be to provide a kind of long service life, good seal performance, the three eccentric hard sealing stopcocks that the operation moment of torsion is low.
To achieve these goals, the utility model is to realize by the following technical solutions:
A kind of three eccentric hard sealing stopcocks comprise the pivot that valve body, spool, valve rod are arranged on valve gap, pressing plate, the Gland on the valve body and the spool bottom is set; It is characterized in that also be provided with the gear-box that drives the spool rotation on valve body, described gear-box connects firmly mutually with Gland; What described spool adopted is three eccentric structures, and is arranged in the valve body by valve rod and pivot, has reduced the friction stroke between spool and the seal ring, has improved working life, has reduced valve switch operation moment of torsion.Valve rod passes Gland and is connected with gear-box, also is provided with seal ring between described valve body and the valve gap.
Adopt elastic packing between described spool and the seal ring, improved sealing reliability and sealing grade, accomplish zero leakage.
Further, described Gland is welded on the valve body, is provided with stem packing between Gland and valve rod, compresses stem packing by Gland and realizes valve stem seal.
As preferably, between above-mentioned seal ring and valve body, also establish Graphite pad, increase the effect of sealing.
As preferably, by being threaded, valve gap compresses seal ring and Graphite pad by screw thread and realizes sealing between them between described valve gap and the valve body.
As preferably, described pivot is fixed in the valve body by clutch shaft bearing, and valve rod connects firmly by second bearing and Gland.
The utility model has adopted the design of three eccentric structures by spool, has reduced the friction stroke between spool and the seal ring, has improved working life, has reduced valve switch operation moment of torsion.And adopt elastic packing between spool and the seal ring, improved sealing reliability and sealing grade, accomplish zero leakage.
Description of drawings
Describe the utility model in detail below in conjunction with the drawings and specific embodiments;
Fig. 1 is an an embodiment's of the present utility model structural representation;
Fig. 2 is to be the spool of model utility and the sectional structure schematic representation under the sealing state between the seal ring originally.
Among the figure: 1, valve body, 2 spools, 3, clutch shaft bearing, 4, second bearing, 5, stem packing, 6, valve rod, 7, pressing plate, 8, seal ring, 9, pivot, 10, Gland, 11, valve gap, 12, gear-box, 13, double-screw bolt, 14, nut, 15, screw, 16, support, 17, Graphite pad, 18, screw.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
Referring to Fig. 1, the utility model provides a kind of good seal performance, the three eccentric hard sealing stopcocks that the operation moment of torsion is low comprise valve body 1, spool 2, valve gap 11, stem packing 5, valve rod 6, pressing plate 7, seal ring 8, Gland 10, gear-box 12 and support 16; Spool 2 is fixed on the central authorities of valve body 1 by valve rod 6 and pivot 9, pivot 9 is installed in the valve body by clutch shaft bearing 3, and second bearing 4 is installed on Gland 10 lower end inwalls, is used for fixing and connects valve rod 6, by valve rod 6 and pivot 9 spool 2 can only be rotated, can not move up and down.
Valve body 1 is provided with valve gap 11, between valve body 1 and the valve gap 11 with being threaded, stud with seal ring 8 between valve body 1 and valve gap 11, also be provided with Graphite pad 17 between sealing circle 8 and the valve body 1, valve gap 11 compresses seal ring 8 and Graphite pad 17 by screw thread and realizes sealing between them.Spool 2 in the present embodiment has also adopted three eccentric structures, has reduced the friction stroke between spool and the seal ring, has improved working life, has reduced valve switch operation moment of torsion.
It should be noted that, the gear-box 12 that drives the spool rotation also is installed on valve body 1, this valve rod 6 passes Gland 10 and is connected with gear-box 12, Gland 10 is welded on the valve body 1, gear-box 12 is fixed on the Gland 10 by support 16 and screw 15, nut 14, be filled with stem packing 5 between Gland 10 upper end inwalls and valve rod 6, valve stem seal is that pressured plate 7 compresses stem packing 5 and realizes.
During the utility model work, gear-box 12 actuate valve stem 6 make it drive spool 2 rotations, when spool 2 rotates to and contacts with seal ring 8, because spool 2 is the designs of three eccentric structures, in the middle of the many processes of rotation, produce the component that compresses seal ring, so just realize the sealing between spool 2 and the seal ring 8, also just realized the function of valve seal.
The utility model drives spool 2 by gear-box 12, and adopts elastic packing between spool 2 and seal ring 8, has improved sealing reliability and sealing grade, accomplishes zero leakage.And spool 2 has adopted the design of three eccentric structures, has reduced the friction stroke between spool 2 and the seal ring 8, has improved working life, has reduced valve switch operation moment of torsion.
More than show and described basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof
Claims (5)
1. an eccentric hard sealing stopcock comprises the pivot (9) that valve body (1), spool (2), valve rod (6) are arranged on valve gap (11), pressing plate (7), the Gland (10) on the valve body and the spool bottom is set; It is characterized in that also be provided with the gear-box (12) that drives spool (2) rotation on valve body (1), described gear-box (12) connects firmly mutually with Gland (10); What described spool (2) adopted is three eccentric structures, and be arranged in the valve body (1) by valve rod (6) and pivot (9), valve rod (6) passes Gland (10) and is connected with gear-box (12), also is provided with seal ring (8) between described valve body (1) and the valve gap (11).
2. according to claim 1 three eccentric hard sealing stopcocks is characterized in that described Gland (10) is welded on the valve body (1), are provided with stem packing (5) between Gland (10) and valve rod (6).
3. according to claim 1 and 2 three eccentric hard sealing stopcocks is characterized in that, between described valve gap (11) and the valve body (1) by being threaded.
4. according to claim 1 three eccentric hard sealing stopcocks is characterized in that, also establish Graphite pad (17) between described seal ring (8) and valve body (1).
5. according to claim 1 three eccentric hard sealing stopcocks is characterized in that described pivot (9) is fixed in the valve body (1) by clutch shaft bearing (3), and valve rod (6) connects firmly by second bearing (4) and Gland (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201196232U CN201973269U (en) | 2011-04-21 | 2011-04-21 | Triple eccentric hard seal plug valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201196232U CN201973269U (en) | 2011-04-21 | 2011-04-21 | Triple eccentric hard seal plug valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201973269U true CN201973269U (en) | 2011-09-14 |
Family
ID=44578372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201196232U Expired - Fee Related CN201973269U (en) | 2011-04-21 | 2011-04-21 | Triple eccentric hard seal plug valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201973269U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226472A (en) * | 2011-04-21 | 2011-10-26 | 昆山维萨阀门有限公司 | Three-eccentric hard sealed plug valve |
-
2011
- 2011-04-21 CN CN2011201196232U patent/CN201973269U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226472A (en) * | 2011-04-21 | 2011-10-26 | 昆山维萨阀门有限公司 | Three-eccentric hard sealed plug valve |
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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: 20110914 Termination date: 20190421 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |