CN212297656U - Butterfly valve - Google Patents
Butterfly valve Download PDFInfo
- Publication number
- CN212297656U CN212297656U CN202020600558.4U CN202020600558U CN212297656U CN 212297656 U CN212297656 U CN 212297656U CN 202020600558 U CN202020600558 U CN 202020600558U CN 212297656 U CN212297656 U CN 212297656U
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- CN
- China
- Prior art keywords
- valve
- valve plate
- ring
- sealing ring
- dovetail groove
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- 238000007789 sealing Methods 0.000 claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 239000012530 fluid Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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Abstract
The utility model relates to a butterfly valve, it has improved the valve block in the valve body, has seted up the dovetail on the outer face of cylinder of valve block, and the sealing ring is installed to this dovetail, and the cross-section of the sealing ring of putting into is, and its outer ring portion is convex, and the interior ring part is trapezoidal. Thus, when the seal ring is placed in the dovetail groove, the outer surface of the trapezoidal portion of the seal ring is closely attached to the inner surface of the trapezoidal groove. And the left end surface of the valve plate is provided with a connecting hole for driving the valve plate to rotate. The sealing ring not only meets the sealing performance of the existing design, but also has the firmness degree of being arranged in a dovetail groove far higher than that of an O-shaped sealing ring arranged in a rectangular groove. The possibility that the seal ring may easily come off due to the influence of the operating force is prevented. Hardly affected in terms of manufacturing costs.
Description
Technical Field
The utility model belongs to the technical field of fluid valve class makes, especially relate to a butterfly valve.
Background
At present, for butterfly valves with high requirements on sealing performance, the sealing performance can be generally obtained only by means of improving the precision grade of parts in order to achieve the ideal sealing effect due to the high requirements on the sealing performance, so the production cost is high. However, because the valve body and the valve plate are rigidly sealed, even if the precision grade of parts is improved, a small amount of leakage still exists during opening and closing. In addition, the mutual sealing overlapping part of the valve plate and the valve body is in rigid connection, and the valve plate is difficult to open after being closed, and even the phenomenon that the valve plate cannot be opened even when the handle is broken. Due to the processing precision and the assembling precision, the sealing performance of the lap joint part of the butterfly valve plate and the valve body is poor, so that the butterfly valve plate and the valve body cannot be smoothly vacuumized along with the main machine during debugging or maintenance, and the maintenance is inconvenient. Although some plate valves are improved, the O-shaped sealing ring is added on the outer diameter of the valve plate to improve the sealing performance and the vacuum-pumping performance, the defects of O-shaped ring slippage, short service life and the like in the use process still exist. And a metal sealing ring is arranged on the valve plate, so that the method has good sealing effect but high manufacturing cost.
As shown in fig. 3 and 4, the assembly schematic diagrams of two transformer steel plate butterfly valves are shown, and the sealing degree is improved by using an O-shaped sealing ring as a transition lap joint to improve the sealing of the lap joint part between the valve plate and the valve body. The O-shaped sealing ring is sleeved in the groove with the annular U-shaped cross section formed in the valve plate, and when the O-shaped sealing ring on the valve plate is in compression joint with the conical column surface on the fluid through hole in the valve body, the valve plate and the O-shaped sealing ring seal the fluid through hole in the valve body. The fluid can not pass through the fluid through hole on the valve body and leak, playing the role of blocking the fluid. When the butterfly valve needs to be opened to allow fluid to pass through, the valve rod rotates to drive the valve plate and the O-shaped sealing ring to rotate. The valve plate rotates to implement and plays a role in opening and closing the valve, when the O-shaped sealing ring is in compression joint with a contact part separated from the valve body, the O-shaped sealing ring is subjected to the force in the rotating direction of the valve plate, and the O-shaped sealing ring is easy to fall off, so that the butterfly valve loses the sealing function when being closed. The valve plate and the O-shaped sealing ring are separated from the contact with the fluid through hole of the valve body, and the fluid passes through the fluid through hole on the valve body. The fastener is fixed connection valve block and valve rod, and the connecting hole of valve block does not pierce through the valve block, reduces the fluid that the influence of connecting the pair probably produced and reveals. The function of the indicating cap is that when the indicating cap is matched and connected with the upper part of the valve rod, the valve can be identified to be in an opening state or a closing state through an arrow on the indicating cap and a corresponding symbol on the valve body.
Disclosure of Invention
The utility model discloses a cross sectional shape who establishes the recess of sealing washer with valve block facial make-up sets up to the forked tail flute profile, and the cross sectional shape of the sealing washer that disposes does, and its inner loop part cross-section is trapezoidal, and outer loop part cross-section is convex. The valve plate has the advantages that when the valve plate rotates by taking the vertical shaft as the axis, the sealing ring is not easy to fall off when the friction force generated by the fluid through hole of the valve body is opened or closed. The reason is that the dovetail groove structure can partially bear the pressure in the direction of the center of the valve sheet and the resistance in the rotating direction of the valve sheet when the seal ring rotates around the valve rod as an axis. The side surface of the sealing ring is in surface contact with the side surface of the dovetail groove, and the resistance of the dovetail groove to the rotation direction of the sealing ring valve plate is larger than the resistance borne by the O-shaped sealing ring. The sealing ring is not easy to fall off, the stability of the valve function is improved, and the expected sealing effect is achieved. Substantially without an effect on the manufacturing costs.
When the O-shaped sealing ring is arranged in the dovetail groove, as long as the center of the cross section of the O-shaped sealing ring is positioned in the opening of the dovetail groove, the O-shaped sealing ring can also be subjected to pressure from the dovetail groove to the center direction of the valve plate and resistance in the rotating direction of the valve plate when being driven by horizontal force, and the possibility of falling off of the O-shaped sealing ring is reduced.
Technical scheme
The utility model provides a butterfly valve, includes valve body, valve rod, fastener, valve block, first sealing washer and instructs to burst its characterized in that: a dovetail groove is formed in the outer cylindrical surface of the valve plate, and the dovetail groove is annular in the length direction; a first sealing ring is arranged in the dovetail groove, the outer ring surface side part of the cross section of the first sealing ring is arc-shaped, and the inner ring part is trapezoidal.
The plane formed by the symmetrical center lines of the first dovetail groove is parallel to the plane of the valve plate in the vertical direction.
The left end face of the valve plate is provided with a connecting hole used for driving the valve plate to rotate, and the hole does not penetrate through the valve plate.
The utility model has the advantages that: the utility model discloses the recess that is used for installing the sealing washer that sets up on the well valve block is the dovetail, and the shape in the cross-section of sealing washer, and its lateral part is trapezoidal for arc medial part. The sealing ring is more firm to install, and the phenomenon that the sealing ring possibly falls off due to the action of operating force is prevented. The manufacturing cost is hardly influenced, and the sealing effect is the same as that of an O-shaped sealing ring.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is the schematic view of the valve plate structure of the present invention.
Fig. 3 is a schematic structural diagram of a steel plate butterfly valve of a conventional transformer.
Fig. 4 is a schematic view of another butterfly valve according to the prior art.
In fig. 1, 1 is a valve body, 2 is a valve rod, 3 is a fastener, 4 is a valve plate, 5 is a first sealing ring, 6 is an indicating cap, 7 is a second sealing ring, 8 is a third sealing ring, and 9 is a fourth sealing ring.
In fig. 2, reference numeral 10 denotes a dovetail groove and 11 denotes a plane.
In fig. 3, 01 is a valve body, 02 is a valve rod, 03 is a fastener, 04 is a valve plate, 05 is an O-shaped sealing ring, and 06 is an indicator cap.
Detailed Description
The utility model provides a butterfly valve includes valve body 1, valve rod 2, fastener 3, valve block 4, first sealing washer 5 and instructs and to emit 6, its characterized in that: a dovetail groove 10 is formed in the outer cylindrical surface of the valve plate 4, and the dovetail groove 10 is annular in the length direction; a first seal ring 5 is installed in the dovetail groove 10, the outer ring surface side part of the cross section of the first seal ring 5 is in a circular arc shape, and the inner ring part is in a trapezoid shape.
The plane formed by the symmetrical center lines of the first dovetail groove 10 is parallel to the plane 11 of the valve plate 4 in the vertical direction.
The left end face of the valve plate 4 is provided with a connecting hole for driving the valve plate 4 to rotate, and the hole does not penetrate through the valve plate 4.
As shown in fig. 1, the dovetail groove 10 formed on the valve plate 4 and the first seal ring 5 are installed in the dovetail groove 10, so that when the valve plate 4 blocks the fluid flow hole on the valve body 1, the first seal ring 5 increases the sealing degree when the valve is closed, thereby preventing the fluid from leaking. The section of the inner ring part of the dovetail groove 10 and the section of the inner ring part of the first seal ring 5 are the same, and the corresponding contact parts are in surface contact. When the valve plate 4 rotates around the axis of the valve rod 2, and the valve body 1 generates a force perpendicular to the axis of the valve rod 2 on the first seal ring 5, the first seal ring 5 is not easy to fall off from the dovetail groove 10. Because the dovetail groove 10 is in surface contact with the first seal ring 5, resistance to the first seal ring 5 coming off is increased. Superior to the O-ring seal provided by the U-shaped groove of fig. 3.
In order to reduce the leakage point of the valve, the connection hole formed in the valve sheet 4 for driving the valve sheet 4 to rotate does not penetrate through the valve sheet 4.
The second seal ring 7, the third seal ring 8 and the fourth seal ring 9 are provided to increase the sealing of the connection sub portion and prevent the liquid leakage.
The function of the indicator cap 6 is to identify whether the valve is in an open state or a closed state through an arrow on the indicator cap 6 and a corresponding symbol on the valve body 1.
Claims (3)
1. The utility model provides a butterfly valve, includes valve body (1), valve rod (2), fastener (3), valve block (4), first sealing washer (5) and instructs to emit (6), its characterized in that: a dovetail groove (10) is formed in the outer cylindrical surface of the valve plate (4), and the dovetail groove (10) is annular in the length direction; a first sealing ring (5) is arranged in the dovetail groove (10), the outer ring surface side part of the cross section of the first sealing ring (5) is in a circular arc shape, and the inner ring part is in a trapezoid shape.
2. A butterfly valve in accordance with claim 1, wherein: a plane formed by the symmetrical center lines of the first dovetail groove (10) is parallel to a plane (11) of the valve plate (4) in the vertical direction.
3. A butterfly valve in accordance with claim 1, wherein: the left end face of the valve plate (4) is provided with a connecting hole for driving the valve plate (4) to rotate, and the hole does not penetrate through the valve plate (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020600558.4U CN212297656U (en) | 2020-04-21 | 2020-04-21 | Butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020600558.4U CN212297656U (en) | 2020-04-21 | 2020-04-21 | Butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212297656U true CN212297656U (en) | 2021-01-05 |
Family
ID=73974347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020600558.4U Active CN212297656U (en) | 2020-04-21 | 2020-04-21 | Butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212297656U (en) |
-
2020
- 2020-04-21 CN CN202020600558.4U patent/CN212297656U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210630 Address after: Room 247-10370, 2 / F, 109-1 quanyun Road, Shenyang area, China (Liaoning) pilot Free Trade Zone, Shenyang, Liaoning 110000 Patentee after: Shenyang Keqi Technology Co.,Ltd. Address before: 110044 1-4-1, 234-15 Beihai street, Dadong District, Shenyang City, Liaoning Province Patentee before: Shao Xingyuan |