CN210372042U - Two-way pure metal hard seal butterfly valve - Google Patents
Two-way pure metal hard seal butterfly valve Download PDFInfo
- Publication number
- CN210372042U CN210372042U CN201920991590.7U CN201920991590U CN210372042U CN 210372042 U CN210372042 U CN 210372042U CN 201920991590 U CN201920991590 U CN 201920991590U CN 210372042 U CN210372042 U CN 210372042U
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- valve
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- sealing ring
- seat
- butterfly
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Abstract
The utility model relates to a two-way pure metal butterfly valve that seals firmly, this kind of two-way pure metal butterfly valve that seals firmly include valve body, butterfly plate, disk seat and actuating mechanism, the butterfly plate sets up in the valve body, its characterized in that: the butterfly plate is characterized in that a sealing groove is formed in the outer circular surface of the butterfly plate, a metal sealing ring is arranged in the sealing groove, an O-shaped sealing ring is arranged in the sealing groove and is located between the metal sealing ring and the inner wall of the sealing groove, the metal sealing ring is in sealing contact with a valve seat, the valve seat is made of metal, and the hardness difference of 5-10HRC exists between the metal sealing ring and the valve seat. According to the bidirectional pure metal hard seal butterfly valve, the metal sealing ring of the butterfly plate and the valve seat made of metal materials have proper hardness difference, and the two pure metal sealing rings are paired, so that the application range and the service life of the bidirectional butterfly valve are improved.
Description
Technical Field
The utility model belongs to the technical field of the valve, specifically relate to a two-way pure metal butterfly valve sealed firmly.
Background
The bidirectional butterfly valve is widely applied to various industrial pipelines, particularly large-diameter pipelines, such as petroleum, chemical industry, gas, heating power, power stations, metallurgy, papermaking and the like, is suitable for media such as gas, liquid and the like, is not limited by the flow direction of the media in installation, is not influenced by spatial position, and can be installed on pipelines at will. The traditional bidirectional butterfly valve mostly adopts soft sealing or soft and hard combined composite sealing, is limited by sealing materials and structures, and is not suitable for the working condition of high temperature and high pressure containing granular media.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome not enough among the above-mentioned prior art, provide a two-way pure metal butterfly valve sealed firmly, the sealed face of butterfly plate and the sealed face of disk seat all adopt high rigidity pure metal material, and have 5-10 HRC's hardness poor, be applicable to high temperature high pressure and have the granule medium operating mode, sealed reliable, wear-resisting resistant washing away, very big improvement the life of product.
This kind of two-way pure metal butterfly valve sealed firmly includes valve body, butterfly plate, disk seat and actuating mechanism, the butterfly plate sets up in the valve body, its characterized in that: the butterfly plate is characterized in that a sealing groove is formed in the outer circular surface of the butterfly plate, a metal sealing ring is arranged in the sealing groove, an O-shaped sealing ring is arranged in the sealing groove and is located between the metal sealing ring and the inner wall of the sealing groove, the metal sealing ring is in sealing contact with a valve seat, the valve seat is made of metal, and the hardness difference of 5-10HRC exists between the metal sealing ring and the valve seat.
The valve comprises a valve body and is characterized in that a spring seat is welded on the valve body, a spring groove is formed in one side, facing the valve seat, of the spring seat, a guide part is arranged on one side, facing the spring seat, of the valve seat, the guide part is axially and slidably arranged in the spring groove, a spring acting on the guide part is arranged in the spring groove, and an adjusting distance is formed between the other side of the valve seat and the valve body.
And a first sealing ring is arranged on the outer circular surface of the valve seat.
The valve body is connected with a packing gland, and graphite packing is arranged between the packing gland and the valve body.
And sliding bearings are arranged at the upper and lower matching parts of the valve body and the valve rod.
The lower end of the valve rod is provided with a split ring.
According to the utility model provides a pair of two-way pure metal butterfly valve sealed firmly, the metal seal circle of butterfly plate has suitable hardness with metal material's disk seat poor, and both pure metal seal circles pair to the application range and the life of two-way butterfly valve have been improved.
Drawings
Fig. 1 is a cross-sectional view of the present invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
fig. 3 is a partially enlarged view of B in fig. 1.
Detailed Description
As shown in fig. 1, the bidirectional pure metal hard seal butterfly valve comprises a valve body 1, a butterfly plate 3, a valve seat 4, a valve rod 2 and a driving mechanism 8, wherein the valve rod 2 and the driving mechanism 8 adopt a key connection mode to transmit an opening and closing moment, and the valve rod 2 and the butterfly plate 3 adopt a taper pin connection mode to transmit an opening and closing moment; the butterfly plate 3 is arranged in the valve body 1, as shown in fig. 2, a seal groove is formed in the outer circular surface of the butterfly plate 3, a metal seal ring 30 is arranged in the seal groove, an O-shaped seal ring 31 is arranged in the seal groove, the O-shaped seal ring 31 is positioned between the metal seal ring 30 and the inner wall of the seal groove, and the metal seal ring 30 is in sealing contact with the valve seat 4; the valve seat 4 is made of metal, and a hardness difference of 5-10HRC exists between the metal sealing ring 30 and the valve seat 4. Because the metal sealing ring 30 of the butterfly plate 3 and the valve seat 4 made of metal material have proper hardness difference, when the two pure metal sealing rings are matched, the application range and the service life of the bidirectional butterfly valve can be obviously improved.
In the bidirectional pure metal hard seal butterfly valve, the metal seal ring 30 is ground after the pure metal ring is processed into the conical seal surface on the special eccentric clamping fixture, and the valve seat 4 is ground after the pure metal ring is processed into the conical seal surface on the same special eccentric clamping fixture, so that the precision and the interchangeability are ensured.
The utility model discloses the welding has spring holder 7 on valve body 1, and spring holder 7 is equipped with spring groove 70 towards a side of disk seat 4, and disk seat 4 has guide portion 40 towards a side of spring holder 7, but guide portion 40 sets up in spring groove 70 with axial slip, is equipped with the spring (not drawn) that is used in guide portion 40 in the spring groove 70, has the spacing between disk seat 4's opposite side and the valve body 1. When the medium passes in the forward flow direction, the spring force and the force of the fluid provide enough sealing force to push the metal sealing ring 30 to be tightly attached to the valve seat 4 to realize sealing, when the medium passes in the reverse flow direction, the force of the fluid acting on the valve seat 4 overcomes the force of the spring to push the valve seat 4 to float and tightly attach to the metal sealing ring 30 to realize sealing.
In addition, the outer circular surface of the valve seat 4 is provided with a first sealing ring 41, as shown in fig. 2, to ensure the axial sealing during the floating process of the valve seat 4.
As shown in fig. 1, a packing gland 6 is connected to the valve body 1, and a graphite packing 5 is disposed between the packing gland 6 and the valve body 1. The graphite packing 5 can ensure the sealing property above the valve body 1.
As shown in fig. 3, the sliding bearings 11 are disposed at the upper and lower matching portions of the valve body 1 and the valve rod 2, and the sliding bearings 11 can effectively reduce the opening and closing torque.
As shown in FIG. 3, the lower end of the valve stem 2 is provided with a split ring 10 to prevent the valve stem 2 from axially moving and wearing the sealing surface of the valve seat 4.
Claims (6)
1. Two-way pure metal butterfly valve sealed firmly includes valve body (1), butterfly plate (3), disk seat (4) and actuating mechanism (8), butterfly plate (3) set up in valve body (1), its characterized in that: the butterfly plate sealing structure is characterized in that a sealing groove is formed in the outer circular surface of the butterfly plate (3), a metal sealing ring (30) is arranged in the sealing groove, an O-shaped sealing ring (31) is arranged in the sealing groove, the O-shaped sealing ring (31) is located between the metal sealing ring (30) and the inner wall of the sealing groove, the metal sealing ring (30) is in sealing contact with the valve seat (4), the valve seat (4) is made of metal, and 5-10HRC hardness difference exists between the metal sealing ring (30) and the valve seat (4).
2. The bi-directional pure metal hard seal butterfly valve of claim 1, wherein: the valve is characterized in that a spring seat (7) is welded on the valve body (1), a spring groove (70) is formed in one side, facing the valve seat (4), of the spring seat (7), a guide portion (40) is arranged on one side, facing the spring seat (7), of the valve seat (4), the guide portion (40) is axially slidably arranged in the spring groove (70), a spring acting on the guide portion (40) is arranged in the spring groove (70), and an adjusting interval is formed between the other side of the valve seat (4) and the valve body (1).
3. The bi-directional pure metal hard seal butterfly valve of claim 1, wherein: and a first sealing ring (41) is arranged on the outer circular surface of the valve seat (4).
4. The bi-directional pure metal hard seal butterfly valve of claim 1, wherein: the valve is characterized in that a packing gland (6) is connected to the valve body (1), and graphite packing (5) is arranged between the packing gland (6) and the valve body (1).
5. The bi-directional pure metal hard seal butterfly valve of claim 1, wherein: and sliding bearings (11) are arranged at the upper and lower matching parts of the valve body (1) and the valve rod (2).
6. The bi-directional pure metal hard seal butterfly valve of claim 5, wherein: the lower end of the valve rod (2) is provided with a split ring (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920991590.7U CN210372042U (en) | 2019-06-28 | 2019-06-28 | Two-way pure metal hard seal butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920991590.7U CN210372042U (en) | 2019-06-28 | 2019-06-28 | Two-way pure metal hard seal butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210372042U true CN210372042U (en) | 2020-04-21 |
Family
ID=70268185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920991590.7U Active CN210372042U (en) | 2019-06-28 | 2019-06-28 | Two-way pure metal hard seal butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210372042U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022133900A1 (en) * | 2020-12-24 | 2022-06-30 | 浙江石化阀门有限公司 | High-pressure large-diameter two-way hard-sealing butterfly valve |
-
2019
- 2019-06-28 CN CN201920991590.7U patent/CN210372042U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022133900A1 (en) * | 2020-12-24 | 2022-06-30 | 浙江石化阀门有限公司 | High-pressure large-diameter two-way hard-sealing butterfly valve |
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