CN211624224U - Novel shaft hole seal structure under butterfly valve - Google Patents
Novel shaft hole seal structure under butterfly valve Download PDFInfo
- Publication number
- CN211624224U CN211624224U CN201922490791.1U CN201922490791U CN211624224U CN 211624224 U CN211624224 U CN 211624224U CN 201922490791 U CN201922490791 U CN 201922490791U CN 211624224 U CN211624224 U CN 211624224U
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- China
- Prior art keywords
- shaft hole
- valve body
- blanking cover
- lower shaft
- shaped ring
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Abstract
The utility model relates to the technical field of butterfly valves, in particular to a novel butterfly valve lower shaft hole sealing structure, which comprises a valve body, a first O-shaped ring, a second O-shaped ring and a rear blanking cover; the upper portion of back blanking cover is equipped with the bellying, and the bellying inserts in the lower shaft hole of valve body, be equipped with the recess around the bellying, first O shape circle sets up in the recess, the lower shaft hole department of valve body is equipped with the chamfer, and second O shape circle sets up chamfer department and with back blanking cover cooperation, back blanking cover pass through the bolt with the valve body is fixed. An O-shaped ring groove is processed on the cylindrical surface of the rear blanking cover, and an O-shaped ring is arranged to play a role in sealing the shaft hole. In addition, the orifice of the lower shaft hole of the valve body is chamfered, an annular cavity with a triangular section is formed by the chamfer and the cylindrical surface of the rear blanking cover, an O-shaped ring is arranged in the cavity, and a safe sealing structure is formed for the lower shaft hole of the valve body again, so that the safety of the shaft hole is ensured.
Description
Technical Field
The utility model relates to a butterfly valve technical field especially relates to a novel shaft hole seal structure under butterfly valve.
Background
The existing common butterfly valve has the leakage risk, and the main leakage points are all arranged at the lower shaft hole of the valve.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main objective is exactly to above-mentioned problem, provides a novel shaft hole seal structure under butterfly valve, prevents outer the hourglass.
The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:
the utility model provides a novel shaft hole seal structure under butterfly valve which characterized in that: the valve comprises a valve body, a first O-shaped ring, a second O-shaped ring and a rear blanking cover; the upper portion of back blanking cover is equipped with the bellying, and the bellying inserts in the lower shaft hole of valve body, be equipped with the recess around the bellying, first O shape circle sets up in the recess, the lower shaft hole department of valve body is equipped with the chamfer, and second O shape circle sets up chamfer department and with back blanking cover cooperation, back blanking cover pass through the bolt with the valve body is fixed.
Preferably, the middle part of the lug boss is provided with a U-shaped groove.
The utility model has the advantages that the O-shaped ring groove is processed on the cylindrical surface of the rear plug cover, and the O-shaped ring is arranged to play a role in sealing the shaft hole. In addition, the orifice of the lower shaft hole of the valve body is chamfered, an annular cavity with a triangular section is formed by the chamfer and the cylindrical surface of the rear blanking cover, an O-shaped ring is arranged in the cavity, and a safe sealing structure is formed for the lower shaft hole of the valve body again, so that the safety of the shaft hole is ensured.
Drawings
Fig. 1 is a front view of the present invention.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided in connection with the accompanying drawings. As shown in fig. 1, a novel butterfly valve lower shaft hole sealing structure comprises a valve body 1, a first O-shaped ring 2, a second O-shaped ring 3 and a rear blanking cover 4; the upper portion of back blanking cover is equipped with bellying 5, and the bellying inserts in the lower shaft hole of valve body, be equipped with recess 6 around the bellying, first O shape circle sets up in the recess, the middle part of bellying has the U-shaped groove. The lower shaft hole department of valve body is equipped with the chamfer, and second O shape circle sets up chamfer department and with back blanking cover cooperation, back blanking cover pass through the bolt with the valve body is fixed. The valve body and the valve shaft are sealed through the two O-shaped rings, so that the sealing effect of the lower shaft hole is effectively improved.
When the valve is used, the O-shaped ring groove is machined on the cylindrical surface of the rear plug cover, the annular groove is machined in the rear plug cover, the first O-shaped ring is placed behind the annular groove, the second O-shaped ring is placed at the root of the rear plug cover, and the rear plug cover is inserted into the shaft hole in the bottom of the valve body and is fixed on the valve body through the bolt.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (2)
1. The utility model provides a novel shaft hole seal structure under butterfly valve which characterized in that: the valve comprises a valve body, a first O-shaped ring, a second O-shaped ring and a rear blanking cover; the upper portion of back blanking cover is equipped with the bellying, and the bellying inserts in the lower shaft hole of valve body, be equipped with the recess around the bellying, first O shape circle sets up in the recess, the lower shaft hole department of valve body is equipped with the chamfer, and second O shape circle sets up chamfer department and with back blanking cover cooperation, back blanking cover pass through the bolt with the valve body is fixed.
2. The novel butterfly valve lower shaft hole sealing structure of claim 1, characterized in that: the middle part of the bulge part is provided with a U-shaped groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922490791.1U CN211624224U (en) | 2019-12-31 | 2019-12-31 | Novel shaft hole seal structure under butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922490791.1U CN211624224U (en) | 2019-12-31 | 2019-12-31 | Novel shaft hole seal structure under butterfly valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211624224U true CN211624224U (en) | 2020-10-02 |
Family
ID=72635153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922490791.1U Active CN211624224U (en) | 2019-12-31 | 2019-12-31 | Novel shaft hole seal structure under butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211624224U (en) |
-
2019
- 2019-12-31 CN CN201922490791.1U patent/CN211624224U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |