CN203115129U - Triple eccentric metallic seal butterfly valve - Google Patents
Triple eccentric metallic seal butterfly valve Download PDFInfo
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- CN203115129U CN203115129U CN 201320029429 CN201320029429U CN203115129U CN 203115129 U CN203115129 U CN 203115129U CN 201320029429 CN201320029429 CN 201320029429 CN 201320029429 U CN201320029429 U CN 201320029429U CN 203115129 U CN203115129 U CN 203115129U
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- butterfly plate
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Abstract
The utility model discloses a triple eccentric metallic seal butterfly valve. The triple eccentric metallic seal butterfly valve comprises a valve base, and further comprises a valve rod, wherein a valve body is integrated with valve base, a butterfly plate is arranged in the valve body, and a sealing ring is located on the butterfly plate. The triple eccentric metallic seal butterfly valve is characterized in that a deviated size A is formed between an axis of the valve rod and a sealing surface of the butterfly plate, a deviated size B is formed between an axis of the valve rod and a channel axis of the valve body, and an eccentric angle alpha is formed between a rotating axis of the valve base and the channel axis of the valve body. The triple eccentric metallic seal butterfly valve has the advantages of being strong in pressure-resisting ability, good in sealing effect and capable of achieving zero leakage. Preferably, according to the technical scheme, a taper angle of the sealing surface of the butterfly plate is smaller than a friction angle of a sealing material adopted by the sealing ring, and therefore self locking is achieved by the butterfly plate as long as the butterfly plate is closed to a sealing position, and the butterfly plate bears certain reverse pressure impact.
Description
Technical field
The utility model relates to a kind of parts that are used for realizing pipe-line system break-make and flow control, in particular for a kind of three eccentric metal seal butterfly valve in many fields such as oil, chemical industry, metallurgy, water power, urban construction.
Background technique
Butterfly valve is to use comparatively common a kind of parts of realizing pipeline break-make and flow control in pipeline, and sealing effect is structurally comparatively reliable.
In Chinese patent literature CN102425677A, a kind of three eccentric metal hard sealed butterfly damper is disclosed, as shown in Figure 1, the technological scheme that adopts is, this three eccentric metal hard sealed butterfly damper, comprise valve plate, valve body, seal ring, pressing plate and valve rod, relative eccentric between described valve rod axis and the valve plate side that connects valve rod, and with valve body (2) axis between relative eccentric, described seal ring is arranged in the seal groove of valve plate and pressing plate pressing, and the sealing surface of the seal ring of contact pressing plate is provided with the U-groove bevel of annular.
In addition, at Chinese patent literature CN2366626Y a kind of three-dimensional eccentric metal seal butterfly valve is disclosed also.
Disclosed butterfly valve in the above-mentioned patent documentation, still there is defective in sealing effect, can't accomplish zero leakage, and it is limited to bear pressure, and after long-time the use, sealability descends.
The model utility content
It is strong that the technical problems to be solved in the utility model provides a kind of anti-pressure ability, good sealing effect, a kind of three eccentric metal seal butterfly valve of realization zero leakage.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of three eccentric metal seal butterfly valve, comprise valve seat, valve body and valve seat disjunctor, butterfly plate is arranged in the valve body, and seal ring is positioned on the butterfly plate, also include valve rod, size A of biasing between the axis of valve rod and the sealing surface of butterfly plate, and with size B of the passage axis of valve body biasing, the valve seat rotational axis forms an eccentric angle a with passage axis with valve body.
Adopt the three eccentric metal seal butterfly valve of technique scheme, because size A of biasing between the axis of valve rod and the sealing surface of butterfly plate, and with size B of the passage axis of valve body biasing, the valve seat rotational axis with form an eccentric angle a with the passage axis of valve body, so formed three off-centre, when butterfly valve is opened from 0 ~ 90 °, the sealing surface of butterfly plate can break away from the valve seat front cover immediately in the moment of opening, it is when closing for 90 ~ 0 °, only at turn-off transient, the butterfly plate sealing surface just can contact and compress sealing surface of seat, but can realize the arbitrary adjustment to seal pressure by adding the change of driving moment, the beneficial effect of its generation is, no any friction between the sealing surface on valve seat and the butterfly plate, removed wearing and tearing and leak possibility; In addition, seal ring is positioned on the butterfly plate, and the beneficial effect of its generation is, and is easy for installation, makes that the sealing effect of butterfly plate is better.
As further improvement of the utility model, seal ring on the described butterfly plate adopts the stacked stainless steel sheets of soft or hard and Expanded graphite to combine, make it have metal hard-sealing and elastic packing two-fold advantage, the beneficial effect of its generation is, no matter is that high temperature or low temperature all have good performance.
As further improvement of the utility model, the sealing surface cone angle of described butterfly plate makes and realizes self-locking when described butterfly plate closes sealing station immediately less than the friction angle of the used sealing material of seal ring, and bears certain backpressure and impact.
As further improvement of the utility model, the sealing surface of described valve body adopts pile-up welding hard alloy or stainless steel, and the beneficial effect of its generation is that hardness is good, and is wear-resistant, can open and close not damaged more than 60000 times continuously.
As further improvement of the utility model, described seal ring is clipped on the butterfly plate by pressing plate, adopts such structure, and the beneficial effect of its generation is to be easier to install, to regulate and to change.
As further improvement of the utility model, the position up and down of described valve body all is equipped with axle sleeve, and the beneficial effect of its generation is, prevents stem wear and adhesion, improves working life.
As further improvement of the utility model, described butterfly plate adopts flitch formula structure, and the beneficial effect of its generation is, makes butterfly plate intensity height, and area of passage is big, and flow resistance is little.
Description of drawings
Further describe below in conjunction with accompanying drawing and mode of execution of the present utility model:
Fig. 1 is the prior art constructions schematic representation;
Fig. 2 is longitudinal sectional view of the present utility model;
Fig. 3 is structural representation of the present utility model;
Wherein: the 1-valve body, the 2-butterfly plate, the 3-valve rod, the 4-pressing plate, the 5-seal ring, 6-adjusts circle.
Embodiment
In order further to understand the improvement that the utility model is made prior art, earlier prior art is carried out following explanation: as shown in Figure 1, it is existing three eccentric metal hard sealed butterfly damper, comprise valve plate 101, valve body 102, sealing 103, pressing plate 104 and valve rod 106, relative eccentric between described valve 106 axis and valve plate 101 sides that connect valve rod 106, and with valve body 102 axis between relative eccentric, described seal ring 103 is arranged in the seal groove of valve plate 101 and pressing plate 104 pressings, the sealing surface of the seal ring 103 of contact pressing plate 104 is provided with the U-groove bevel 105 of annular, the notch of sealing 103 U-groove bevel 105 is provided with the gap between the sealing surface of outer periphery and pressing plate 104, described gap is 0.lmm ~ 0.3mm, and described seal ring 103 is the O-ring seals 103 of being made by the rubber-like bulk metal.
When forward sealed, the torsion of the pressure of medium and valve rod 106 was superimposed upon on the valve plate 101, reached zero leakage thereby push valve plate 101 to valve body 102 sealing surfaces; Oppositely during sealing, the pressure of medium is opposite with the torsion of valve rod 106, and when the torsion of big ten valve rods 106 of pressure of medium, medium pushes away valve body 102 sealing surfaces with valve plate 101, occurs trickle gap between the two.Increase the elasticity of seal ring 103 at bulk metal seal ring 103 U-groove bevel 105 of getting on the bus, remedy the displacement amount of medium sealing surface when reverse.Behind U-groove bevel 105, medium acts in the U-groove bevel 105, makes seal ring 103 that radial and outward deformation be arranged, thereby remedies distortion and the displacement of valve plate 101, and butterfly valve still keeps sealing state.
Above-mentioned existing three eccentric metal hard sealed butterfly damper, its defective are that still there is defective in sealing effect, can't accomplish zero leakage, and it is limited to bear pressure, and after long-time the use, sealability descends.
For understanding the novel content of this enforcement more easily, the following stated relate to about, up and down with accompanying drawing in the orientation be consistent.
As shown in Figure 2, this implements novel a kind of three eccentric metal seal butterfly valve, comprises valve seat, valve body 1 and valve seat disjunctor, butterfly plate 2 is arranged in the valve body 1, seal ring is positioned on the butterfly plate 2, also includes valve rod 3, size A of biasing between the sealing surface of the axis of valve rod 3 and butterfly plate 2, and with size B of the passage axis of valve body 1 biasing, the valve seat rotational axis with form an eccentric angle a with the passage axis of valve body 1, this angle a scope between 2 ~ 10 degree, 3.5 degree preferably.
Seal ring 5 on the butterfly plate 2 adopts the stacked stainless steel sheets of soft or hard and Expanded graphite to combine, the sealing surface cone angle of butterfly plate 2 is less than the friction angle of seal ring 5 used sealing materials, make and realize self-locking when described butterfly plate 2 closes to sealing station immediately, and bear certain backpressure and impact, the sealing surface of described valve body 1 adopts pile-up welding hard alloy or stainless steel, described seal ring 5 is clipped on the butterfly plate 1 by pressing plate 4, can also arrange near seal ring and adjust circle 6, the position up and down of described valve body 1 all is equipped with axle sleeve.
Adopt the three eccentric metal seal butterfly valve of the technical solution of the utility model, anti-pressure ability is strong, and good sealing effect has been realized zero leakage.
By reference to the accompanying drawings mode of execution of the present utility model has been done detailed explanation above, but the utility model is not limited to above-mentioned mode of execution, in the ken that affiliated technical field those of ordinary skill possesses, can also under the prerequisite that does not break away from the utility model aim, make a variety of changes.
Claims (7)
1. three eccentric metal seal butterfly valve, comprise valve seat, valve body (1) and valve seat disjunctor, butterfly plate (2) is arranged in the valve body (1), seal ring (5) is positioned on the butterfly plate (2), also includes valve rod (3), it is characterized in that: size A of biasing between the sealing surface of the axis of valve rod (3) and butterfly plate (2), and with size B of the passage axis of valve body (1) biasing, eccentric angle a of passage axis formation of valve seat rotational axis and valve body (1).
2. a kind of three eccentric metal seal butterfly valve as claimed in claim 1 is characterized in that, the seal ring (5) on the described butterfly plate (2) adopts the stacked stainless steel sheets of soft or hard and Expanded graphite to combine.
3. a kind of three eccentric metal seal butterfly valve as claimed in claim 1, it is characterized in that, the sealing surface cone angle of described butterfly plate (2) is less than the friction angle of the used sealing material of seal ring (5), make and realize self-locking immediately when described butterfly plate (2) closes to sealing station, and bear certain backpressure and impact.
4. a kind of three eccentric metal seal butterfly valve as claimed in claim 1 is characterized in that, the sealing surface of described valve body (1) adopts pile-up welding hard alloy or stainless steel.
5. a kind of three eccentric metal seal butterfly valve as claimed in claim 1 is characterized in that, described seal ring (5) is clipped on the butterfly plate (2) by pressing plate (4).
6. a kind of three eccentric metal seal butterfly valve as claimed in claim 1 is characterized in that, the position up and down of described valve body (1) all is equipped with axle sleeve.
7. as each described three eccentric metal seal butterfly valve of claim 1 ~ 3, it is characterized in that described butterfly plate (2) adopts flitch formula structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029429 CN203115129U (en) | 2013-01-21 | 2013-01-21 | Triple eccentric metallic seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320029429 CN203115129U (en) | 2013-01-21 | 2013-01-21 | Triple eccentric metallic seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203115129U true CN203115129U (en) | 2013-08-07 |
Family
ID=48895477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320029429 Expired - Fee Related CN203115129U (en) | 2013-01-21 | 2013-01-21 | Triple eccentric metallic seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203115129U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425293A (en) * | 2019-08-20 | 2019-11-08 | 科福龙阀门集团有限公司 | Novel three eccentric two-way hard seal butterfly valve |
| CN114623245A (en) * | 2022-03-15 | 2022-06-14 | 上海华电阀门集团有限公司 | Bidirectional sealing type leakage-proof butterfly valve |
-
2013
- 2013-01-21 CN CN 201320029429 patent/CN203115129U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425293A (en) * | 2019-08-20 | 2019-11-08 | 科福龙阀门集团有限公司 | Novel three eccentric two-way hard seal butterfly valve |
| CN114623245A (en) * | 2022-03-15 | 2022-06-14 | 上海华电阀门集团有限公司 | Bidirectional sealing type leakage-proof butterfly valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20140121 |