CN220168593U - Butterfly valve with maintenance sealing pair - Google Patents
Butterfly valve with maintenance sealing pair Download PDFInfo
- Publication number
- CN220168593U CN220168593U CN202321522955.4U CN202321522955U CN220168593U CN 220168593 U CN220168593 U CN 220168593U CN 202321522955 U CN202321522955 U CN 202321522955U CN 220168593 U CN220168593 U CN 220168593U
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- CN
- China
- Prior art keywords
- valve
- overhaul
- sealing
- valve body
- seal
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000007789 sealing Methods 0.000 title claims abstract description 91
- 238000012423 maintenance Methods 0.000 title claims abstract description 15
- 238000012856 packing Methods 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 9
- 210000004907 gland Anatomy 0.000 claims description 8
- 229910002804 graphite Inorganic materials 0.000 claims description 8
- 239000010439 graphite Substances 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- Lift Valve (AREA)
Abstract
A butterfly valve with maintenance sealing pair comprises a valve body, a valve rod and a butterfly plate, wherein the valve rod is divided into an upper valve rod and a lower valve rod which are fixedly connected with an upper shaft hole and a lower shaft hole of the butterfly plate through pin shafts respectively; the method is characterized in that: a main sealing pair and an overhaul sealing pair are arranged between the butterfly plate and the valve body, the main sealing pair consists of a main sealing valve seat and a main sealing ring on the butterfly plate, and the overhaul sealing pair consists of an overhaul valve seat and an overhaul sealing ring; the main sealing valve seat is axially and floatingly arranged on a radial inner step of the valve body outlet channel by a positioning ring.
Description
Technical Field
The utility model relates to the field of mechanical sealing, in particular to a butterfly valve with an overhaul sealing system.
Background
The butterfly valve opening and closing piece is a disc, and the opening and closing piece sealing surface is separated from or pressed on the valve seat sealing surface by rotating around the valve rod center line perpendicular to the valve through hole center line, so that the opening and closing of the valve is realized.
When the existing butterfly valve leaks in the operation process, the butterfly valve can be overhauled by stopping the pipeline and evacuating medium in the pipeline, so that the normal operation of the pipeline is affected.
Disclosure of Invention
The utility model aims at overcoming the defects of the prior art and provides a butterfly valve with an overhaul sealing pair, which can repair the sealing pair on line in a valve closing state.
The technical scheme for realizing the purpose of the utility model is as follows:
a butterfly valve with maintenance sealing pair comprises a valve body, a valve rod and a butterfly plate, wherein the valve rod is divided into an upper valve rod and a lower valve rod which are fixedly connected with an upper shaft hole and a lower shaft hole of the butterfly plate through pin shafts respectively; the method is characterized in that: a main sealing pair and an overhaul sealing pair are arranged between the butterfly plate and the valve body, the main sealing pair consists of a main sealing valve seat and a main sealing ring on the butterfly plate, and the overhaul sealing pair consists of an overhaul valve seat and an overhaul sealing ring; the main sealing valve seat is axially and floatingly arranged on a radial inner step of the valve body outlet channel by a positioning ring.
Preferably, the main seal valve seat and the maintenance valve seat are provided with conical sealing surfaces, the taper of the conical sealing surfaces of the main seal valve seat faces the outlet direction of the valve body channel, and the taper of the conical sealing surfaces of the maintenance valve seat faces the inlet direction of the valve body channel; the main sealing ring and the maintenance sealing ring are rubber sealing rings and are respectively pressed on radial steps on the end surfaces of two sides of the butterfly plate through bolts by the pressing plate and the maintenance pressing plate.
Preferably, the main seal and the service seal have spherical sealing surfaces.
Preferably, a bearing is arranged on the outer circular surface of the upper valve rod below the stuffing box, and dust-proof graphite is arranged on the outer circular surface of the contact part of the upper valve rod below the bearing and the valve body.
Preferably, the outer circular surface of the contact part of the lower valve rod and the valve body is provided with ash-proof graphite.
Preferably, an O-shaped ring is arranged between the inner hole wall of the packing gland and the outer circular surface of the upper valve rod, and an O-shaped ring is arranged between the outer circular surface of the packing gland and the contact surface of the valve body.
Preferably, an annular sealing ring is arranged on the contact surface of the main sealing valve seat and the inner wall of the valve body channel.
Compared with the prior art, the utility model has the beneficial effects that: the butterfly plate and the valve body are provided with the main sealing pair and the maintenance sealing pair, when the main sealing pair leaks, the maintenance sealing pair can be closed, the main sealing pair component can be maintained or replaced on line, and the butterfly plate and the valve body have the advantages of convenience in maintenance, high operation efficiency and the like.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
Fig. 2 is an enlarged view of a portion of fig. 1 a of the present utility model.
Fig. 3 is a partial enlarged view of the present utility model at B in fig. 1.
In the figure: 1 valve body, 2 ash-proof graphite, 3 clamp plates, 4 pin shafts, 5 butterfly plates, 6 valve rods, 7 dust-proof graphite, 8 bearings, 9O-shaped rings, 10 transmission mechanisms, 11 overhaul valve seats, 12 overhaul sealing rings, 13 overhaul clamp plates, 14 main sealing rings, 15 positioning rings, 16 ring-shaped sealing rings and 17 main sealing valve seats.
Detailed Description
The butterfly valve with maintenance sealing pair as shown in figure 1 comprises a valve body 1, a valve rod 6 and a butterfly plate 5, wherein the valve rod 6 consists of an upper valve rod and a lower valve rod, the upper valve rod and the lower valve rod are respectively and fixedly connected with an upper shaft hole and a lower shaft hole of the butterfly plate 5 through a pin shaft 4, the butterfly plate 5 is fixedly arranged in a flow passage of the valve body 1, the upper end of the upper valve rod passes through the valve body 1 and a bracket and is fixedly connected with a transmission mechanism 10, a packing box is arranged between the upper valve rod and the valve body 1, and the upper part of the packing box is tightly pressed by a packing gland; the method is characterized in that: a main sealing pair and an overhaul sealing pair are arranged between the butterfly plate 5 and the valve body 1, the main sealing pair consists of a main sealing valve seat 17 and a main sealing ring 14 on the butterfly plate 5, and the overhaul sealing pair consists of an overhaul valve seat 11 and an overhaul sealing ring 12; the overhaul valve seat 11 and the main sealing valve seat 17 are respectively arranged on the inner walls of the inlet and outlet channels of the valve body 1 at the two sides of the shaft hole of the valve rod 6, and the main sealing valve seat 17 is axially and floatingly arranged on the radial inner step of the outlet channel of the valve body 1 by the positioning ring 15, so that the main sealing valve seat 17 can axially move between the radial inner step of the valve body 1 and the positioning ring 15 to form a floating valve seat structure with a bidirectional sealing function. When the main sealing pair leaks in the use process, only the valve is required to be closed, and the main sealing pair component is detached on line for maintenance and replacement, so that the maintenance is convenient.
The main seal valve seat 17 and the overhaul valve seat 11 are provided with conical sealing surfaces, the taper of the conical sealing surfaces of the main seal valve seat 17 faces the outlet direction of the valve body 1 channel, the taper of the conical sealing surfaces of the overhaul valve seat 11 faces the inlet direction of the valve body 1 channel, and the butterfly plate 5 can flexibly rotate between the main seal valve seat 17 and the overhaul valve seat 11 through the taper design of the conical sealing surfaces of the main seal valve seat 17 and the overhaul valve seat 11; the main sealing ring 14 and the overhaul sealing ring 12 are rubber sealing rings, are respectively pressed on radial steps on two side end surfaces of the butterfly plate 5 through the pressing plate 3 and the overhaul pressing plate 13 through screws, and are in reliable sealing fit with the main sealing valve seat 17 and the overhaul valve seat 11 by utilizing elasticity of rubber materials, as shown in fig. 2 and 3.
The main sealing ring 14 and the overhaul sealing ring 12 are provided with spherical sealing surfaces, so that linear sealing fit between the main sealing valve seat 17 and the overhaul valve seat 11 is realized, and the sealing performance of the sealing pair is improved.
The bearing 8 is arranged on the outer circular surface of the valve rod 6 below the stuffing box, and the dustproof graphite 7 is arranged between the outer circular surface of the valve rod 6 below the bearing 8 and the valve body 1, so that sundries of media in the using process can be prevented from being sucked into the bearing 8 to influence the rotation of the valve rod 6.
An outer circular surface of the contact part of the lower valve rod and the valve body 1 is provided with ash-proof graphite 2.
An O-shaped ring 9 is arranged between the inner hole wall of the packing gland and the outer circular surface of the valve rod 6, and the O-shaped ring 9 is arranged between the outer circular surface of the packing gland and the contact surface of the valve body 1, so that the tightness of the packing box is improved, and medium leakage is prevented.
An annular sealing ring 16 is arranged on the contact surface of the main sealing valve seat 17 and the inner wall of the valve body 1, so that the tightness between the main sealing valve seat 17 and the inner wall of the channel is improved.
Claims (7)
1. The utility model provides a butterfly valve with overhaul seal pair, including valve body (1), valve rod (6) and butterfly plate (5), valve rod (6) are constituteed by last valve rod and lower valve rod, and both pass through the last shaft hole and the lower shaft hole fixed connection of round pin axle (4) with butterfly plate (5) respectively, set up butterfly plate (5) in valve body (1) runner, go up valve rod upper end and pass valve body (1) and support, with drive mechanism (10) fixed connection, set up the packing box between last valve rod and valve body (1), the packing box top is compressed tightly by the packing gland, characterized by: a main sealing pair and an overhaul sealing pair are arranged between the butterfly plate (5) and the valve body (1), the main sealing pair consists of a main sealing valve seat (17) and a main sealing ring (14) on the butterfly plate (5), and the overhaul sealing pair consists of an overhaul valve seat (11) and an overhaul sealing ring (12); the overhaul valve seat (11) and the main sealing valve seat (17) are respectively arranged on the inner wall of the inlet and outlet channels of the valve body (1) at the two sides of the shaft hole of the valve rod (6), and the main sealing valve seat (17) is axially and floatingly arranged on the radial inner step of the outlet channel of the valve body (1) by a positioning ring (15).
2. The butterfly valve with service seal of claim 1, wherein: the main seal valve seat (17) and the overhaul valve seat (11) are provided with conical sealing surfaces, the taper of the conical sealing surfaces of the main seal valve seat (17) faces the outlet direction of the channel of the valve body (1), the taper of the conical sealing surfaces of the overhaul valve seat (11) faces the inlet direction of the channel of the valve body (1), the main seal ring (14) and the overhaul seal ring (12) are rubber seal rings, and the main seal ring and the overhaul seal ring are respectively pressed on radial steps of the end surfaces of two sides of the butterfly plate (5) through the pressing plate (3) and the overhaul pressing plate (13) through screws.
3. The butterfly valve with service seal of claim 2, wherein: the main seal ring (14) and the maintenance seal ring (12) are provided with spherical seal surfaces.
4. A butterfly valve with an access seal as recited in claim 3, wherein: the outer circular surface of the valve rod (6) below the stuffing box is provided with a bearing (8), and the outer circular surface of the contact part of the valve rod (6) below the bearing (8) and the valve body (1) is provided with dustproof graphite (7).
5. The butterfly valve with service seal of claim 3 or 4, wherein: an ash-proof graphite (2) is arranged at the contact position of the outer circular surface of the lower valve rod and the valve body (1).
6. The butterfly valve with service seal of claim 5, wherein: an O-shaped ring (9) is arranged between the inner hole of the packing gland and the outer circular surface of the valve rod (6), and the O-shaped ring (9) is arranged between the outer circular surface of the packing gland and the valve body (1).
7. The butterfly valve with service seal of claim 6, wherein: an annular sealing ring (16) is arranged on the contact surface of the main sealing valve seat (17) and the inner wall of the valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321522955.4U CN220168593U (en) | 2023-06-15 | 2023-06-15 | Butterfly valve with maintenance sealing pair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321522955.4U CN220168593U (en) | 2023-06-15 | 2023-06-15 | Butterfly valve with maintenance sealing pair |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220168593U true CN220168593U (en) | 2023-12-12 |
Family
ID=89058641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321522955.4U Active CN220168593U (en) | 2023-06-15 | 2023-06-15 | Butterfly valve with maintenance sealing pair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220168593U (en) |
-
2023
- 2023-06-15 CN CN202321522955.4U patent/CN220168593U/en active Active
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| GR01 | Patent grant |