CN204533566U - Four eccentric two-way seal butterfly valves - Google Patents
Four eccentric two-way seal butterfly valves Download PDFInfo
- Publication number
- CN204533566U CN204533566U CN201520095828.XU CN201520095828U CN204533566U CN 204533566 U CN204533566 U CN 204533566U CN 201520095828 U CN201520095828 U CN 201520095828U CN 204533566 U CN204533566 U CN 204533566U
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- valve
- valve plate
- valve body
- rod
- eccentric
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- Expired - Fee Related
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Abstract
The utility model belongs to control valve for fluids field, relate to a kind of valve body realizing two way sealed, specifically a kind of four eccentric two-way seal butterfly valves, comprise valve body, valve plate, valve rod, seal ring, valve plate is installed in valve body, valve rod rotates and is arranged in valve body axis hole, is fixedly connected with, realizes the synchronous axial system of valve plate and valve rod between valve plate with valve rod by pin; Filler assembly, Gland, hold-down grid load the stuffing box place of valve body successively, and by locking nut, screw rod fixing seal; Pad, seal ring, trim ring are installed on valve plate successively, and are locked by hex head bolt; Valve plate axle housing two ends arrange a boss respectively, and body cavity is provided with the groove platform matched with described boss.This butterfly valve can realize two way sealed, wear resistance is good, and required torque is little, long service life, can ensure that apparatus safely and smoothly runs.
Description
Technical field
The utility model belongs to control valve for fluids field, relates to a kind of valve body realizing two way sealed, specifically a kind of four eccentric two-way seal butterfly valves.
Background technique
As everyone knows, the valve body of butterfly valve normally allows the cylinder-like part that fluid flows through.It is characterized in that, valve plate is provided with sealing surface, and during action, valve plate rotates centered by valve shaft, and in course of action, the sealing surface on valve plate is pressed close to or departed from sealing surface of seat set on valve body, thus realizes closing or open function.
Butterfly valve mainly contains several large class of centre type butterfly valve, single eccentric-butterfly-valve, double eccentric butterfly valve and three eccentric butterfly valve.The evolution process of butterfly valve eccentric structure, its objective is and reduce the wearing and tearing of valve in opening-closing process between valve plate and valve seat.In existing technology, the structure characteristic of three eccentric butterfly valve is that valve plate center had both been departed from valve rod axle center, and also depart from sealing surface center, the cone type axis deviation of sealing surface of valve plate is in valve body cylinder axis.Maximum feature eccentric is for the third time exactly fundamentally change seal construction, is no longer position seals, but torsion sealing, not the resiliently deformable relying on valve seat, but rely on the surface of contact pressure of valve seat to reach sealing effect completely.Learn according to the geometrical relationship between three eccentricity: the seal point away from valve shaft center is larger with valve opening respective change rate, and the seal point at close valve shaft center is less with the respective change rate of valve opening, because the seal point variance ratio of seal ring periphery is inconsistent, seal ring is caused to there is the problem of seal ring periphery unbalance stress and distortion inequality, under the effect of valve rod moment, the sealing force of seal ring periphery and the stress of generation are not etc., there are high pressure district and low pressure zone, cause the distortion of seal ring periphery inconsistent.This distortion inconsistent along seal ring periphery, can not realize the two way sealed of valve, also have impact on sealing effect and the working life of valve.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, there is provided a kind of structure simple, ingenious, rational four eccentric two-way seal butterfly valves, this butterfly valve can realize two way sealed, wear resistance is good, required torque is little, long service life, can ensure that apparatus safely and smoothly runs.
Technological scheme according to the utility model provides: a kind of four eccentric two-way seal butterfly valves, comprise valve body, valve plate, valve rod, seal ring, it is characterized in that: described valve plate is installed in valve body, valve rod rotates and is arranged in valve body axis hole, be fixedly connected with by pin between valve plate with valve rod, realize the synchronous axial system of valve plate and valve rod; Filler assembly, Gland, hold-down grid load the stuffing box place of valve body successively, and by locking nut, screw rod fixing seal; Pad, seal ring, trim ring are installed on valve plate successively, and are locked by hex head bolt; Valve plate axle housing two ends arrange a boss respectively, and body cavity is provided with the groove platform matched with described boss.
As further improvement of the utility model, described pad is arranged between valve plate and seal ring, forms plane sealing.
As further improvement of the utility model, valve body axis hole bottom is provided with bearing support, and valve rod lower end is rotated by plane bearing and is arranged on bearing support, arranges back-up ring, positioned by back-up ring to valve rod between bearing support and the valve stem end shaft shoulder.
As further improvement of the utility model, described valve body axis hole lower end is tightly connected end flange, is provided with spacer between end flange and valve rod.
As further improvement of the utility model, be ellipsoid on described valve plate, for supporting the step surface of seal ring.
The utility model compared with prior art, advantage is: seal ring is fixed on valve plate by socket head screw by trim ring, if seal ring damage or when needing to be replaced with more wear-resisting, corrosion resistant material, need not dismantle valve plate and valve shaft, seal ring can on-line maintenance, reduces user cost; Step surface valve plate supporting seal ring is ellipse, supports seal ring uniformly, makes seal ring uniform force; The axially locating step of lining is set in the valve seat planes of valve body, shortens the distance between axle force bearing point and the axle strong point, adds the rigidity of axle; Valve plate is an one-piece parts with four eccentric configuration.In closing process, valve plate is with valve shaft central rotation, and when driveing with neutral position, seal ring does not contact with valve seat, without interfering.When the valve is closed, the cam at valve plate axle housing two ends contacts with the groove platform on valve body, and along with valve closing, closes tighter and tighter, achieves valve two way sealed; Groove platform on valve body and the cam on valve plate, can adopt differential hardening process, extends valve working life.
Accompanying drawing explanation
Fig. 1 is the utility model construction profile erection drawing.
Fig. 2 is the A-A cross section view of Fig. 1.
Fig. 3 is the B-B cross section view of Fig. 1.
Fig. 4 is the axis side view that the utility model valve body and valve plate coordinate.
Fig. 5 is the schematic diagram that the utility model boss coordinates with groove platform.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in Fig. 1 ~ 5, comprise valve body 1, groove platform 1a, valve plate 2, boss 2a, valve rod 3, pin 4, lining 5, filler assembly 6, Gland 7, hold-down grid 8, screw rod 9, locking nut 10, pad 11, seal ring 12, trim ring 13, hex head bolt 14, plane bearing 15, bearing support 16, back-up ring 17, end flange 18, spacer 19 etc.
As shown in Fig. 1 ~ 5, a kind of four eccentric two-way seal butterfly valves of the utility model, comprise valve body 1, valve plate 2, valve rod 3, seal ring 12, described valve plate 2 is installed in valve body 1, and valve rod 3 rotates and is arranged in valve body 1 axis hole, is fixedly connected with between valve plate 2 with valve rod 3 by pin 4, realize the synchronous axial system of valve plate 2 and valve rod 3, valve plate 2 rotates under valve rod 3 drives, near or away from the valve seat on valve body 1, realize closing and the object of Open valve; Filler assembly 6, Gland 7, hold-down grid 8 load the stuffing box place of valve body 1 successively, and by locking nut 1, screw rod 9 fixing seal; Pad 11, seal ring 12, trim ring 13 are installed on valve plate 2 successively, and are locked by hex head bolt 14; Valve plate 2 axle housing two ends arrange a boss 2a respectively, and valve body 1 inner chamber is provided with the groove platform 1a matched with described boss 2a.
Pad 11 is arranged between valve plate 2 and seal ring 12, forms plane sealing.
Valve body 1 axis hole bottom is provided with bearing support 16, valve rod 3 lower end is rotated by plane bearing 15 and is arranged on bearing support 16, arrange back-up ring 17 between bearing support 16 and the valve rod 3 end shaft shoulder, positioned by back-up ring 17 pairs of valve rods 3, back-up ring 17 is as the upper limit of valve rod 3.
Described valve body 1 axis hole lower end is tightly connected end flange 18, and be provided with spacer 19 between end flange 18 and valve rod 3, carry out axial clearance adjustment by spacer 19 pairs of valve rods 3, spacer 19 is as the lower limit of valve rod 3.
Be ellipsoid on described valve plate 2, for supporting the step surface of seal ring 12, filler assembly 6 comprises Packing seat and filler spacer, on valve rod 3 diameter of axle, corresponding to valve plate 2 both sides, arrange a lining 5 respectively.
The structural type of seal ring 12 can adopt Multi-layer sealing or solid seal ring, and the sheet metal material of seal ring 12 can with 316 or INCONEL718, and the nonmetallic material in interlayer can adopt graphite or PTFE; Sealing surface of seat on valve body can adopt differential hardening process, sealing area built-up welding STE alloy.
Working principle of the present utility model: the valve plate 2 in the utility model has four bias, axis deviation valve plate 2 center of valve rod 3, the axis deviation valve plate 2 sealing surface center of valve rod 3 simultaneously, the cone type axis deviation of valve plate 2 sealing surface in body cylinder axis, the boss 2a axle misalignment valve rod 3 axle center at axle housing place, valve plate 2 two ends.Valve is when folding neutral position, and the seal ring 12 on valve plate 2 does not contact with valve body 1, without amount of interference, frictional force and moment of torsion less, decrease wearing and tearing, effectively increase the service life.Seal ring 12 is arranged on valve plate 2, rotates in company with valve rod 3, near or away from the valve seat on valve body 1, realize closing and Open valve.Pad 11, seal ring 12, trim ring 13 are installed successively, are fixed on valve plate 2 by hex head bolt 14, and pad 11 is arranged between seal ring 12 and valve plate 2 and realizes plane sealing; When flowing medium is entrance from seal ring 12 back side, medium differential pressure can strengthen seal ring 12 and the seal pressure of valve seat, is conducive to valve seal; When medium is entrance from seal ring front, flowing medium pressure reduction is unfavorable for valve seal.Valve torque can compensate the seal point specific pressure away from valve shaft center, and the groove platform 1a of valve body 1 contacts with the boss 2a of valve plate and coordinates, can the seal ring 12 at effective back shaft two ends, increase the specific pressure of the seal point near valve rod center, along with valve closing, close tighter and tighter, thus realize the two way sealed of valve.
Claims (5)
1. an eccentric two-way seal butterfly valve, comprise valve body (1), valve plate (2), valve rod (3), seal ring (12), it is characterized in that: described valve plate (2) is installed in valve body (1), valve rod (3) rotates and is arranged in valve body (1) axis hole, be fixedly connected with by pin (4) between valve plate (2) with valve rod (3), realize the synchronous axial system of valve plate (2) and valve rod (3); Filler assembly (6), Gland (7), hold-down grid (8) load the stuffing box place of valve body (1) successively, and by locking nut (1), screw rod (9) fixing seal; Pad (11), seal ring (12), trim ring (13) are installed on valve plate (2) successively, and are locked by hex head bolt (14); Valve plate (2) axle housing two ends arrange a boss (2a) respectively, and valve body (1) inner chamber is provided with the groove platform (1a) matched with described boss (2a).
2. four eccentric two-way seal butterfly valves as claimed in claim 1, is characterized in that: described pad (11) is arranged between valve plate (2) and seal ring (12), form plane sealing.
3. four eccentric two-way seal butterfly valves as claimed in claim 1, it is characterized in that: valve body (1) axis hole bottom is provided with bearing support (16), valve rod (3) lower end is rotated by plane bearing (15) and is arranged on bearing support (16), back-up ring (17) is set between bearing support (16) and valve rod (3) the end shaft shoulder, by back-up ring (17), valve rod (3) is positioned.
4. four eccentric two-way seal butterfly valves as claimed in claim 1, is characterized in that: described valve body (1) axis hole lower end is tightly connected end flange (18), is provided with spacer (19) between end flange (18) and valve rod (3).
5. four eccentric two-way seal butterfly valves as claimed in claim 1, is characterized in that: be ellipsoid on described valve plate (2), for supporting the step surface of seal ring (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520095828.XU CN204533566U (en) | 2015-02-10 | 2015-02-10 | Four eccentric two-way seal butterfly valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520095828.XU CN204533566U (en) | 2015-02-10 | 2015-02-10 | Four eccentric two-way seal butterfly valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204533566U true CN204533566U (en) | 2015-08-05 |
Family
ID=53747575
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520095828.XU Expired - Fee Related CN204533566U (en) | 2015-02-10 | 2015-02-10 | Four eccentric two-way seal butterfly valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204533566U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633142A (en) * | 2015-02-10 | 2015-05-20 | 无锡智能自控工程股份有限公司 | Four-eccentricity double-way sealing butterfly valve |
| CN105387222A (en) * | 2015-12-16 | 2016-03-09 | 江苏神通阀门股份有限公司 | Limiting structure for a valve rod |
| CN107420562A (en) * | 2017-04-20 | 2017-12-01 | 天津亚通阀门制造有限公司 | The high-efficiency seal structure of sealed butterfly valve |
| CN108131454A (en) * | 2018-02-12 | 2018-06-08 | 无锡智能自控工程股份有限公司 | Three eccentric two-way sealed butterfly valve |
-
2015
- 2015-02-10 CN CN201520095828.XU patent/CN204533566U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104633142A (en) * | 2015-02-10 | 2015-05-20 | 无锡智能自控工程股份有限公司 | Four-eccentricity double-way sealing butterfly valve |
| CN105387222A (en) * | 2015-12-16 | 2016-03-09 | 江苏神通阀门股份有限公司 | Limiting structure for a valve rod |
| CN107420562A (en) * | 2017-04-20 | 2017-12-01 | 天津亚通阀门制造有限公司 | The high-efficiency seal structure of sealed butterfly valve |
| CN108131454A (en) * | 2018-02-12 | 2018-06-08 | 无锡智能自控工程股份有限公司 | Three eccentric two-way sealed butterfly 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150805 Termination date: 20180210 |