CN216867536U - Low leakage rate ventilation butterfly valve - Google Patents
Low leakage rate ventilation butterfly valve Download PDFInfo
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- CN216867536U CN216867536U CN202123308795.7U CN202123308795U CN216867536U CN 216867536 U CN216867536 U CN 216867536U CN 202123308795 U CN202123308795 U CN 202123308795U CN 216867536 U CN216867536 U CN 216867536U
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Abstract
The utility model discloses a ventilation butterfly valve with a low leakage rate, and belongs to the technical field of butterfly valves. It includes valve rod and butterfly plate, the mounting groove has been seted up to butterfly plate outward flange, the mounting groove endotheca is equipped with annular airbag, annular airbag's outside cover is equipped with the sealing washer, the outward flange of sealing washer extends to the mounting groove outside, the intercommunication has the trachea on the annular airbag, the trachea is along the inside outside that extends to of valve rod. According to the utility model, through the arrangement of the annular air bag and the sealing ring, the expansion size of the annular air bag can be controlled through an air source, so that the sealing ring is tightly attached to the valve cavity, the leakage rate is low, or the sealing ring is loosened from the valve cavity, and the locking of the valve rod and the inner wall of the valve cavity is avoided.
Description
Technical Field
The utility model relates to a ventilation butterfly valve with a low leakage rate, and belongs to the technical field of butterfly valves.
Background
The ventilation butterfly valve is applied to dust-containing cold air or hot air gas pipelines of ventilation and environmental protection projects in the industries of chemical engineering, building materials, power stations, glass and the like, and is used as a pipeline control device for regulating flow or cutting off gas media. The ventilation butterfly valve is a regulating valve with simple structure, and is of a non-closed structure under common working conditions, so that more labor is saved by ensuring the rotation of the valve plate, a gap is often left between the valve plate and the inner wall of the valve cavity, and the problem of locking is easily caused by adopting the valve plate which is tightly matched with the inner wall of the valve cavity.
Disclosure of Invention
Aiming at the defects in the background art, the utility model provides the ventilation butterfly valve with low leakage rate, and simultaneously solves the problem that the valve plate is easy to lock.
The utility model is realized by adopting the following technical scheme:
the utility model provides a low leakage rate butterfly valve that ventilates, includes valve rod and butterfly plate, the mounting groove has been seted up to butterfly plate outward flange, the mounting groove endotheca is equipped with annular airbag, annular airbag's outside cover is equipped with the sealing washer, the outward flange of sealing washer extends to outside the mounting groove, the last intercommunication of annular airbag has the trachea, the trachea is along the inside outside that extends to of valve rod.
As a preferable example, one side of the butterfly plate is provided with a pressing plate, the pressing plate forms one side of the mounting groove, and the pressing plate is abutted against the annular air bag and the sealing ring.
As a preferred example, the pressure plate is connected with the butterfly plate by a plurality of bolts.
As a preferable example, the butterfly plate is provided with an annular bulge, the annular bulge forms one side of the mounting groove, and the annular air bag is sleeved on the annular bulge.
As a preferred example, the air pipe penetrates through the annular bulge and the butterfly plate in sequence and extends into the valve rod.
The utility model has the beneficial effects that: according to the utility model, through the arrangement of the annular air bag and the sealing ring, the expansion size of the annular air bag can be controlled through an air source, so that the sealing ring is tightly attached to the valve cavity, the leakage rate is low, or the sealing ring is loosened from the valve cavity, and the locking of the valve rod and the inner wall of the valve cavity is avoided.
Drawings
FIG. 1 is a schematic cross-sectional view of a butterfly plate;
fig. 2 is a schematic sectional view taken along the line a-a in fig. 1.
In the figure: trachea 1, butterfly plate 2, annular arch 3, annular gasbag 4, sealing washer 5, valve rod 6, clamp plate 7.
Detailed Description
In order to make the technical means, the original characteristics, the achieved purpose and the efficacy of the utility model easy to understand, the utility model is further described with reference to the specific drawings.
As shown in fig. 1-2, a low leakage rate ventilation butterfly valve, including valve rod 6 and butterfly plate 2, the mounting groove has been seted up to butterfly plate 2 outward flange, the mounting groove endotheca is equipped with annular gasbag 4, the outside cover of annular gasbag 4 is equipped with sealing washer 5, the outward flange of sealing washer 5 extends to outside the mounting groove, annular gasbag 4 is wrapped up in the mounting groove completely, isolated with external environment, thereby avoid the erosion of interior material of butterfly valve, the intercommunication has trachea 1 on the annular gasbag 4, trachea 1 is along valve rod 6 inside extension to the outside, and with the air supply, equipment intercommunication such as air pump, be used for aerifing or bleeding in the annular gasbag 4.
One side of butterfly plate 2 is provided with clamp plate 7, and clamp plate 7 constitutes one side of mounting groove, and clamp plate 7 offsets with annular gasbag 4, sealing washer 5, and clamp plate 7 is connected with butterfly plate 2 through a plurality of bolts, is convenient for maintain and changes easy damage spare.
Be provided with annular bulge 3 on butterfly plate 2, annular bulge 3 constitutes the one side of mounting groove, and annular gasbag 4 cover is established on annular bulge 3, and trachea 1 runs through annular bulge 3 and butterfly plate 2 in proper order to extend to in the valve rod 6, make frivolous that butterfly plate 2 can be done like this, save material, and trachea 1 can not destroy the sealed environment in the mounting groove.
The working principle is as follows: when valve rod 6 drives butterfly plate 2 and closes, aerify in to annular gasbag 4 through trachea 1, the inflation of admitting air in the annular gasbag 4 this moment, because the restriction of mounting groove, make annular gasbag 4 outwards expand, extrusion seal circle 5, thereby make sealing washer 5 hug closely the valve pocket inner wall, the leakproofness is good, the leakage rate is low, when valve rod 6 drives butterfly plate 2 and opens, bleed in to annular gasbag 4 through trachea 1, annular gasbag 4 shrink this moment, no longer extrusion seal circle 5, thereby it is gapped to make sealing washer 5 and valve pocket inner wall, can easily rotate butterfly plate 2 this moment, prevent to lock.
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, and that various changes and modifications may be made without departing from the spirit and scope of the utility model as defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a low leakage rate ventilation butterfly valve, includes valve rod (6) and butterfly plate (2), its characterized in that: mounting groove has been seted up to butterfly plate (2) outward flange, the mounting groove endotheca is equipped with annular gasbag (4), the outside cover of annular gasbag (4) is equipped with sealing washer (5), the outward flange of sealing washer (5) extends to the mounting groove outside, the intercommunication has trachea (1) on annular gasbag (4), trachea (1) are followed valve rod (6) inside and are extended to the outside.
2. A low leakage rate vent butterfly valve as defined in claim 1, wherein: one side of butterfly plate (2) is provided with clamp plate (7), clamp plate (7) constitute one side of mounting groove, and clamp plate (7) offset with annular gasbag (4), sealing washer (5).
3. A low leakage rate vent butterfly valve as defined in claim 2, wherein: the pressing plate (7) is connected with the butterfly plate (2) through a plurality of bolts.
4. A low leakage rate vent butterfly valve as defined in claim 1, wherein: the butterfly plate (2) is provided with an annular bulge (3), the annular bulge (3) forms one side of the mounting groove, and the annular air bag (4) is sleeved on the annular bulge (3).
5. A low leakage rate vent butterfly valve in accordance with claim 4, wherein: the air pipe (1) penetrates through the annular protrusion (3) and the butterfly plate (2) in sequence and extends into the valve rod (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123308795.7U CN216867536U (en) | 2021-12-27 | 2021-12-27 | Low leakage rate ventilation butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123308795.7U CN216867536U (en) | 2021-12-27 | 2021-12-27 | Low leakage rate ventilation butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216867536U true CN216867536U (en) | 2022-07-01 |
Family
ID=82148765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123308795.7U Active CN216867536U (en) | 2021-12-27 | 2021-12-27 | Low leakage rate ventilation butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216867536U (en) |
-
2021
- 2021-12-27 CN CN202123308795.7U patent/CN216867536U/en active Active
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| GR01 | Patent grant | ||
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