CN2581765Y - Flexible variable pressure sealed eccentric metal butterfly valve - Google Patents
Flexible variable pressure sealed eccentric metal butterfly valve Download PDFInfo
- Publication number
- CN2581765Y CN2581765Y CN 02281115 CN02281115U CN2581765Y CN 2581765 Y CN2581765 Y CN 2581765Y CN 02281115 CN02281115 CN 02281115 CN 02281115 U CN02281115 U CN 02281115U CN 2581765 Y CN2581765 Y CN 2581765Y
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- valve
- sealed
- butterfly
- oil
- valve body
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Abstract
The utility model relates to a flexible variable pressure sealed eccentric metal butterfly valve which is suitable for an oil dipped transformer. The utility model comprises a valve body, a sealed rubber ring, a valve plate, a valve rod and a gland bush. The utility model is characterized in that an oil through hole in the inner side of the valve body is provided with a sealed ring of an elastic tapered frame, and oil inlets are uniformly distributed in the sealed ring of the elastic tapered frame at the sealed inner side of the valve body; the upper part of the valve rod is provided with a movable pressing sleeve, and the outer side of the movable pressing sleeve is sheathed with a helical casing connected with the valve body via screw connection; the top part of the butterfly valve is provided with the sealed ring, a sealed cap and the gland bush in turn, wherein, the sealed cap is connected with the valve rod, and the gland bush is connected with the sealed cap via screw connection. Since the oil through hole in the inner side of the valve body is provided with the sealed ring of the elastic tapered frame, the problem that the normal opening and closing of the butterfly valve is influenced by the aging of rubber and the metal deformation of rigid seal is solved fundamentally, and the service life of the butterfly valve exceeds the service life of a transformer. Since a round inner hole of the sealed cap sheathed with the wrenching part of the valve rod has the function of positioning the valve plate, normal operation of the transformer influenced by the oil flow flushing the valve plate during opening is avoided.
Description
Technical field
The utility model belongs to the valve type technical field, specifically a kind of metal flexible transformation sealed type eccentric-butterfly-valve that is applicable to oil immersed transformer.Specifically be used for transformer and when operation, open or close the transformer oil circuit with maintenance.
Background technique
Butterfly valve is to reuse maximum subassembly products on oil immersed transformer, also is the most flimsy product.At present, the butterfly valve that uses at oil-filled electric transformer can divide two kinds of structures by its valve plate seal form: a kind of is rubber seal formula vacuum eccentric-butterfly-valve, although have good seal performance, open and close characteristics such as flexible, rubber is easily aging, working life is short, transformer oil is had pollution is its fatal weakness.Working life, multipotency reached 5 years, and the transformer main frame life-span can reach 30 years, thereby had influence on the working life of transformer; Another kind is a clamp plate type metal rigidity seal butterfly valve, though it has overcome ageing of rubber, has polluted the transformer oil problem, the rigid seal difficulty of processing is big, cost is high, switching moment is big.When the matching gap of valve body and valve plate surpassed the oil molecule diameter, oil leakage phenomenon will appear.In addition, be subjected to bolt and the outstanding gravity effect of transferring after the installation, small stress deformation can appear in valve body, and the gap of valve body and valve plate is more little, and is big more to valve plate switching influence.Usually because of normally open and close of butterfly valve, and make the transformer maintenance that is forced to drain the oil, thereby directly cause reduce the working life of transformer, maintenance cost and duration strengthen.Above-mentioned in addition two kinds of structures in use, the oil leakage phenomenon of its valve rod is all more serious.
Summary of the invention
The purpose of this utility model provides a kind of metal flexible transformation sealed type eccentric-butterfly-valve of can regulate valve plate seal degree.Advantages such as that structure has is ageing-resistant, long service life.
The purpose of this utility model is achieved in that it includes valve body, flange seal cushion rubber, valve plate, pin, valve rod, seal ring, gland, thread bush, it is characterized in that the inboard oil through of valve body directly is provided with elastic cone reinforced seal ring, is evenly distributed with oil inlet hole on the elastic cone reinforced seal ring of valve seal inboard; Be provided with a movable gland on the top of valve rod, be set with a thread bush that is threaded with valve body in the outside of movable gland; Be disposed with seal ring, sealed cap, gland at the top of butterfly valve, wherein sealed cap is connected with valve rod, and gland is threaded with sealed cap.
Above-mentioned elastic cone reinforced seal ring is made up of the metal frame of bringing oilhole into and cone-shaped metal lining, has annular groove on the metal frame of cone-shaped metal lining inboard; Elastic cone reinforced seal ring is by being threaded on the inboard oil through of the valve body footpath.
The valve body that the utility model also is included in stem lower portion is provided with a stop screw.
For the ease of understanding the on off state of butterfly valve, then have the open and close sign at the top of sealed cap, and have visual window on the corresponding gland of open and close sign.
Therefore the utility model has following advantage owing to adopt the butterfly valve of said structure:
1, elastic cone reinforced seal ring: be to inlay thin metal lining at the metal frame endoporus, and by being welded behind the special device crimping.Have following structural feature:
(1) skeleton inboard, the seal area that contacts with valve plate has an annular groove, makes metal lining have elasticity, forms flexible sealing with valve plate;
(2) sealing surface of sealing ring is taper, and the camber line tangentially with the valve plate edge rotates can reduce butterfly valve open and close moment to greatest extent.
(3) there is screw thread in the reinforced seal ring outside, can be threaded with valve body, and rotating seal ring can be adjusted the tightness that cooperates with valve plate.
(4) reinforced seal ring depended on pressure one side is evenly equipped with oil inlet hole, can conduct by pressure after oil-filled, pressure is affacted on the resilient seal surface of metal lining, when internal pressure increases, pressure to valve plate also increases, thereby forms the transformation sealing, makes sealability more reliable.
The application of reinforced seal ring has fundamentally solved butterfly valve because of flow of metal in ageing of rubber and the rigid seal, influences the normal switch problem, makes the service life of the life-span of butterfly valve above transformer.
2, the valve body of stem lower portion is provided with a stop screw: promptly, open a M6 silk hole, the M6 screw be screwed into, utilize screw side surface and plane, top in valve body bottom, to valve rod carry out 90 ° spacing.If the sealing station of valve plate and sealing surface is inaccurate, can obtain adjusting by stop screw.
3, because the traditional sealing means of butterfly valve valve rod is a thread bush compression rubber sealing, and transformer oil has very strong permeability, and the cushion rubber decrement was less than easy leakage of oil in 30% o'clock.But decrement is excessive, and the frictional force of long valve rod of time one and cushion rubber can increase, and when valve rod rotates, the rubber of cushion rubber inboard is damaged, and causes the valve rod leakage of oil.The utility model has then increased a movable gland in thread bush, when sealing gland is tightened, can make cushion rubber be in normal amount; When butterfly valve being carried out the open and close operation, must take off sealing gland, at this moment gland outwards moves automatically, and the decrement of cushion rubber has the release of obtaining about half, carries out the open and close operation this moment, and is not only laborsaving, and cushion rubber is not constituted damage.Behind the end of operation, the band top cover labyrinth, its cushion rubber returns to normal compressive state again, guarantees that fully oil does not leak outside.
4, the utility model is owing to make screw connected assemblying body with gland and sealed cap, and after internal and external threads entered the sky cutter, sealed cap can freely rotate in gland.Because there is corresponding relation sealing cap and butterfly switch position, when butterfly valve was in the closed position, sealed cap exposed the sign of " pass "; When butterfly valve is in the enable possition, and sealed cap exposes the sign of " opening ", and people can understand the on off state of butterfly valve outside.In addition, because the sealed cap endoporus for round partially, is enclosed within the spanner position of valve rod, valve plate is had positioning action, when preventing to open, oil stream impulsion valve plate influences transformer and normally moves.
" opening ", " pass " Directional Sign are arranged at the butterfly valve top after removing sealing gland, and the reminds people proper operation is in order to avoid the damage correlated parts of oppositely having an effect.
Description of drawings
Below in conjunction with accompanying drawing the utility model is described in further detail.
Fig. 1 is a structural representation sketch of the present utility model
Fig. 2 is the side cutaway view of Fig. 1
Fig. 3 is that the A-A of Fig. 1 is to enlarged diagram
Fig. 4 is that the B-B of Fig. 1 is to amplification profile
Fig. 5 is that the C-C of Fig. 3 is to amplification profile
To be described in further detail model utility by example below, but following example only is the utility model example wherein the rights protection scope of not representing the utility model and being limited.
Embodiment example 1
Shown in Fig. 1-5, among the figure 1 is valve body, 2 is that flange seal cushion rubber, 3 is that O-ring seal, 5 is that pin, 6 is that valve plate, 7 is valve rod, the inboard oil through of valve body directly is provided with an elastic cone reinforced seal ring 4, this elastic cone reinforced seal ring is made up of metal frame 16 that is evenly equipped with four oil throughs 18 and cone-shaped metal lining 17, also has annular groove 19 on the metal frame of cone-shaped metal lining inboard.During installation, this elastic cone reinforced seal ring is threaded in the valve body inboard.Be provided with a movable gland 9 on the top of valve rod 7, be set with a thread bush that is threaded with valve body 10 in the outside of movable gland; Be disposed with seal ring 15, sealed cap 11, gland 12 (shown in Figure 5) at the top of butterfly valve, wherein sealed cap 11 is connected with valve rod 7, and gland 12 is threaded with sealed cap 11.Have the open and close sign at the top of sealed cap, and have visual window 20 on the corresponding gland of open and close sign.In addition, on the valve body 1 of stem lower portion, also be provided with a stop screw 21 (as shown in Figure 4),, can obtain adjusting by stop screw if the sealing station of valve plate and sealing surface is inaccurate.Gland and sealed cap are made screw connected assemblying body, and after internal and external threads entered the sky cutter, sealed cap can freely rotate in gland.Because there is corresponding relation sealing cap and butterfly switch position, when butterfly valve was in the closed position, sealed cap exposed the sign of " pass "; When butterfly valve is in the enable possition, and sealed cap exposes the sign of " opening ", and people can understand the on off state (as shown in Figure 3) of butterfly valve outside.In addition, because the sealed cap endoporus for round partially, is enclosed within the spanner position of valve rod, valve plate is had positioning action, when preventing to open, oil stream impulsion valve plate influences transformer and normally moves.Among the figure 8 is that cushion rubber, 13 is that bolt, 14 is packing ring in addition.The usage of this structure is identical with existing oil immersed transformer butterfly valve.
Claims (5)
1, a kind of metal flexible transformation sealed type eccentric-butterfly-valve that is applicable to oil immersed transformer, it includes valve body, flange seal cushion rubber, valve plate, pin, valve rod, seal ring, gland, thread bush, it is characterized in that the inboard oil through of valve body directly is provided with elastic cone reinforced seal ring, is evenly distributed with oil inlet hole on the elastic cone reinforced seal ring of valve seal inboard; Be provided with a movable gland on the top of valve rod, be set with a thread bush that is threaded with valve body in the outside of movable gland; Be disposed with seal ring, sealed cap, gland at the top of butterfly valve, wherein sealed cap is connected with valve rod, and gland is threaded with sealed cap.
2, eccentric-butterfly-valve according to claim 1 is characterized in that elastic cone reinforced seal ring is made up of the metal frame of bringing oilhole into and cone-shaped metal lining, has annular groove on the metal frame of cone-shaped metal lining inboard.
3, eccentric-butterfly-valve according to claim 1 and 2 is characterized in that elastic cone reinforced seal ring is threaded in the valve body inboard.
4, eccentric-butterfly-valve according to claim 1 is characterized in that the valve body of stem lower portion is provided with a stop screw.
5, eccentric-butterfly-valve according to claim 1 is characterized in that having the open and close sign at the top of sealed cap, and has visual window on the corresponding gland of open and close sign.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02281115 CN2581765Y (en) | 2002-11-14 | 2002-11-14 | Flexible variable pressure sealed eccentric metal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02281115 CN2581765Y (en) | 2002-11-14 | 2002-11-14 | Flexible variable pressure sealed eccentric metal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2581765Y true CN2581765Y (en) | 2003-10-22 |
Family
ID=33743604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02281115 Expired - Fee Related CN2581765Y (en) | 2002-11-14 | 2002-11-14 | Flexible variable pressure sealed eccentric metal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2581765Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110869655A (en) * | 2017-07-11 | 2020-03-06 | 爱三工业株式会社 | Double eccentric valve |
-
2002
- 2002-11-14 CN CN 02281115 patent/CN2581765Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110869655A (en) * | 2017-07-11 | 2020-03-06 | 爱三工业株式会社 | Double eccentric valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |