CN215445103U - Butterfly valve movable valve seat - Google Patents
Butterfly valve movable valve seat Download PDFInfo
- Publication number
- CN215445103U CN215445103U CN202121722602.XU CN202121722602U CN215445103U CN 215445103 U CN215445103 U CN 215445103U CN 202121722602 U CN202121722602 U CN 202121722602U CN 215445103 U CN215445103 U CN 215445103U
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- valve
- valve seat
- gasket
- butterfly
- butterfly plate
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Abstract
The utility model relates to a butterfly valve movable valve seat, comprising: the butterfly plate, the pressing plate, the butterfly plate sealing ring, the first gasket, the set screw, the valve seat, the second gasket, the three-open ring, the first screw and the valve body are fixed on the butterfly plate through the set screw in sequence; the first gasket is positioned between the butterfly plate and the butterfly plate sealing ring; the butterfly plate sealing ring is positioned between the butterfly plate and the first gasket; the valve seat, the three open rings and the second gasket are arranged on the valve body through first screws; a gap is reserved between the valve seat and the three-opening ring; the second gasket is installed between the valve seat and the valve body. The valve seat and the valve body are of a split structure, so that the valve seal of the valve is ensured, and the bidirectional seal of the valve is realized. The valve seat and the valve body are of a split structure, when the valve seat is maintained in the later period, if the sealing surface of the valve seat is damaged, the valve seat can be detached for maintenance, and the valve seat is light in weight, simple in structure and convenient to clamp, so that the maintenance difficulty and the machining maintenance period are reduced.
Description
Technical Field
The utility model relates to a valve seat, in particular to a movable valve seat of a butterfly valve, which has the advantages of split structure of the valve seat and a valve body, good sealing performance, simple structure and convenient maintenance.
Background
The valve seat and the valve body of the common triple eccentric hard seal butterfly valve are of an integral structure, and the sealing surface of the valve seat is of a structure of stainless steel or hard alloy which is built up by welding a body; the sealing ring is fixed with the butterfly plate through the pressing plate and rotates for 90 degrees around the valve rod along with the butterfly plate. The sealing between the sealing surface of the valve plate and the valve seat is realized by pressing the valve plate towards the valve seat by the torque of the transmission device. In the forward flow state, the higher the pressure of the medium, the tighter the seal is pressed. When the unit positive pressure between the valve plate and the valve seat is smaller than the pressure of the medium along with the increase of the pressure of the medium during the medium backflow, the sealing begins to leak, and the requirement of bidirectional sealing of the valve cannot be met.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the main object of the present invention is to provide a movable valve seat for a butterfly valve, which has a split structure between the valve seat and the valve body, and has the advantages of good sealing performance, simple structure and convenient maintenance.
The utility model solves the technical problems through the following technical scheme: a butterfly valve moveable seat, comprising: the butterfly plate, the pressing plate, the butterfly plate sealing ring, the first gasket, the set screw, the valve seat, the second gasket, the three-open ring, the first screw and the valve body are fixed on the butterfly plate through the set screw in sequence; the first gasket is positioned between the butterfly plate and the butterfly plate sealing ring; the butterfly plate sealing ring is positioned between the butterfly plate and the first gasket; the valve seat, the three open rings and the second gasket are arranged on the valve body through first screws; a gap is reserved between the valve seat and the three-opening ring; the second gasket is installed between the valve seat and the valve body.
In an embodiment of the present invention, the second spacer is a flexible graphite spacer.
In an embodiment of the utility model, the valve seat and the valve body are sealed by an O-ring.
In the embodiment of the utility model, the three-opening ring is divided into three parts, the three parts form a circle, the left block and the right block in the three parts are symmetrical, and the radian of the upper block is smaller than that of the left block and the right block.
In the embodiment example of the utility model, the gap between each part of the three open rings is fixedly installed by adopting a second screw.
The positive progress effects of the utility model are as follows: the movable valve seat of the butterfly valve provided by the utility model has the following advantages: the valve seat and the valve body are of a split structure, the principle of forward pressure is the same as that of a traditional hard seal butterfly valve, the valve seal ring moves backwards under the action of a medium during reverse pressure, but the valve seat and the valve body are of the split structure, and the valve seat also displaces under the action of the medium, so that the seal surface of the valve seat and the seal surface of the valve seal ring are always attached to ensure the valve seal of the valve, and the two-way seal of the valve is realized.
The valve seat and the valve body are of a split structure, when the valve seat is maintained in the later period, if the sealing surface of the valve seat is damaged, the valve seat can be detached for maintenance, and the valve seat is light in weight, simple in structure and convenient to clamp, so that the maintenance difficulty and the machining maintenance period are reduced.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2-1 is a front view of a three-open loop of the present invention.
Fig. 2-2 is a cross-sectional view a-a of a three-open ring of the present invention.
The following are the names corresponding to the reference numbers in the utility model:
the butterfly plate sealing device comprises a butterfly plate 1, a pressing plate 2, a butterfly plate sealing ring 3, a first gasket 4, a set screw 5, a valve seat 6, a second gasket 7, an O-shaped ring 8, a three-opening ring 9, a first screw 10, a valve body 11 and a second screw 12.
Detailed Description
The following provides a detailed description of the preferred embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic overall structure of the present invention, as shown in fig. 1: the utility model provides a movable valve seat of a butterfly valve, which comprises a butterfly plate 1, a pressing plate 2, a butterfly plate sealing ring 3, a first gasket 4, a set screw 5, a valve seat 6, a second gasket 7, an O-shaped ring 8, a three-opening ring 9, a first screw 10 and a valve body 11, wherein the first gasket 4, the butterfly plate sealing ring 3 and the pressing plate 2 are fixed on the butterfly plate 1 sequentially through the set screw 5; the first gasket 4 is positioned between the butterfly plate 1 and the butterfly plate sealing ring 3; the butterfly plate sealing ring 3 is positioned between the butterfly plate 1 and the first gasket 4; the valve seat 6, the three-opening ring 9 and the second gasket 7 are arranged on the valve body 11 through first screws 10; a gap is reserved between the valve seat 6 and the three-opening ring 9; the second gasket 7 is mounted between the valve seat 6 and the valve body 11.
In the specific implementation process of the utility model, the second gasket 7 is made of flexible graphite, the valve seat 6 and the valve body 11 are sealed by the O-shaped ring 8, and the second gasket 7, the assembly of the valve seat 6 and the O-shaped ring 8, the three-opening ring 9, the set screw 5 and the first screw 10 are sequentially arranged on the valve body 11.
Fig. 2-1 is a front view of the triple-open ring of the present invention, and fig. 2-2 is a cross-sectional view a-a of the triple-open ring of the present invention, as shown in fig. 2-1 and 2-2: the three-opening ring 9 is divided into three parts, the three parts form a circumference, the left block and the right block in the three parts are symmetrical, and the radian of the upper block is smaller than that of the left block and the right block. In the given figures 2-1 and 2-2, the arc of the top piece is 90 degrees and the arc of the left and right pieces is 135 degrees.
When installed, the distance between two adjacent parts of the three parts ranges from: 0.5-1 mm.
The gaps between the parts of the three open rings 9 are fixedly installed by adopting second screws 12 (the three open rings are prevented from automatically falling off).
The excircle steps of the three open rings are clamped in the annular grooves of the valve body, the first screw 10 is arranged on the three open rings, one end of the screw is propped against the valve seat, and the tighter the first screw 10 is screwed, the tighter the three open rings are clamped.
According to the utility model, a gasket 4, a butterfly plate sealing ring 3 and a pressure plate 2 are sequentially fixed on a butterfly plate 1 through bolts according to a figure 1; sequentially installing a second gasket 7, a valve seat 6 and O-shaped ring 8 assembly, a three-opening ring 9, a set screw 5 and a first screw 10 on a valve body 11 according to the figure 1; the positive pressure of the valve is the same as the sealing principle of the traditional butterfly valve; when the valve is reversely pressed, the second gasket 7 is made of flexible graphite, and the second gasket can generate compression amounts of different degrees according to the pressure, generally 10% -30% of the thickness of the gasket, and the larger the pressure is, the larger the compression amount of the gasket is. The valve seat 6 and the valve body 11 are sealed through the O-shaped ring 8, the valve seat 6 is pressed against the butterfly plate sealing ring under the action of medium pressure difference, so that the valve seat sealing surface is attached to the butterfly plate sealing ring more tightly, and reliable reverse sealing is realized.
The butterfly valve seat and the traditional butterfly valve seat are improved in that the traditional butterfly valve seat is in a body processing form, and the position of a sealing surface of the valve seat cannot be adjusted due to the fact that the valve seat is in a fixed structure; the entire valve must be removed for maintenance of the sealing surface of the valve. A certain gap is designed between the improved butterfly valve seat and the three-opening ring, the position of the valve seat can be adjusted back and forth by adjusting the thickness of the gasket, and the requirement on the machining precision of the sealing surface of the valve is reduced. Secondly, when the sealing surface of the valve needs to be maintained, the whole valve does not need to be taken down from the pipeline, and only the valve seat needs to be taken down for maintenance.
The valve seat 6 and the valve body 11 adopt a split structure, when the valve seat 6 is maintained at the later stage, if the sealing surface of the valve seat 6 is damaged, the valve seat 6 can be detached for maintenance, and the valve seat 6 has light weight and simple structure, is convenient to clamp, and reduces the maintenance difficulty and the machining maintenance period.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are merely illustrative of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined by the appended claims and their equivalents.
Claims (5)
1. The utility model provides a butterfly valve movable valve seat which characterized in that: the butterfly valve movable valve seat includes:
the butterfly plate, the pressing plate, the butterfly plate sealing ring, the first gasket, the set screw, the valve seat, the second gasket, the three-open ring, the first screw and the valve body are fixed on the butterfly plate through the set screw in sequence; the first gasket is positioned between the butterfly plate and the butterfly plate sealing ring; the butterfly plate sealing ring is positioned between the butterfly plate and the first gasket; the valve seat, the three open rings and the second gasket are arranged on the valve body through first screws; a gap is reserved between the valve seat and the three-opening ring; the second gasket is installed between the valve seat and the valve body.
2. The butterfly valve movable seat of claim 1, wherein: the second gasket is made of flexible graphite.
3. The butterfly valve movable seat of claim 1, wherein: the valve seat and the valve body are sealed through an O-shaped ring.
4. The butterfly valve movable seat of claim 1, wherein: the three-opening ring is divided into three parts, the three parts form a circumference, the left block and the right block in the three parts are symmetrical, and the radian of the upper block is smaller than that of the left block and the right block.
5. The butterfly valve movable seat of claim 4, wherein: and the gap between each part of the three open rings is fixedly installed by adopting a second screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121722602.XU CN215445103U (en) | 2021-07-27 | 2021-07-27 | Butterfly valve movable valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121722602.XU CN215445103U (en) | 2021-07-27 | 2021-07-27 | Butterfly valve movable valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215445103U true CN215445103U (en) | 2022-01-07 |
Family
ID=79684756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121722602.XU Active CN215445103U (en) | 2021-07-27 | 2021-07-27 | Butterfly valve movable valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215445103U (en) |
-
2021
- 2021-07-27 CN CN202121722602.XU patent/CN215445103U/en active Active
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