CN216201082U - Sleeve air sealing device for rotary butterfly valve shaft - Google Patents
Sleeve air sealing device for rotary butterfly valve shaft Download PDFInfo
- Publication number
- CN216201082U CN216201082U CN202122135783.2U CN202122135783U CN216201082U CN 216201082 U CN216201082 U CN 216201082U CN 202122135783 U CN202122135783 U CN 202122135783U CN 216201082 U CN216201082 U CN 216201082U
- Authority
- CN
- China
- Prior art keywords
- air
- butterfly valve
- rotary
- sleeve
- shaft
- Prior art date
- 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.)
- Expired - Fee Related
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 35
- 210000004907 gland Anatomy 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 238000001125 extrusion Methods 0.000 abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910002804 graphite Inorganic materials 0.000 abstract description 3
- 239000010439 graphite Substances 0.000 abstract description 3
- 239000002912 waste gas Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 4
- 230000002146 bilateral effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses a sleeve air sealing device for a rotary butterfly valve shaft. The utility model adopts the air-tight mode to replace the graphite disk extrusion mode in the prior art, thereby having low requirement on the processing precision of the workpiece, opening the compressed air valve, filling compressed air between the rotating shaft and the sealing sleeve, and preventing the leakage of waste gas by forming positive pressure inside the rotating shaft and the sealing sleeve.
Description
Technical Field
The utility model relates to the field of butterfly valve production, in particular to a sleeve air sealing device for a rotary butterfly valve shaft.
Background
The sealing is realized by adopting a graphite packing to extrude and compact between a rotating shaft and a sealing sleeve of the existing butterfly valve. Therefore, the requirement on the precision of workpiece processing is high, and the extrusion force of the gland is difficult to hold accurately. When the squeezing pressure is too low, the sealing effect is poor and leakage is easy to occur; when the extrusion pressure degree is too high, the sealing effect can be achieved, but the resistance is high when the shaft rotates, the torque is large, and the service life is shortened.
SUMMERY OF THE UTILITY MODEL
In order to solve the defects of the prior art, the utility model provides a sleeve air sealing device for a rotary butterfly valve shaft.
In order to solve the technical problems, the utility model adopts the technical scheme that: an air chamber is arranged between a rotating shaft and a sealing sleeve of a butterfly valve, and the air chamber is filled with compressed air for sealing.
Furthermore, the sealing sleeve is connected with an air pipe, and compressed air is filled into the air chamber through the air pipe.
Furthermore, the other end of the air pipe is connected with a compressed air production device, and a compressed air valve for controlling the opening and closing of the air pipe is installed on the air pipe.
Further, the seal cover is installed on the valve body, the end portion of the seal cover is fixedly provided with a gland through a bolt, the gland is sleeved on the rotating shaft, and the seal cover closes an opening in the side face of the air chamber through the gland.
Furthermore, the sleeve air sealing devices are symmetrically arranged on the rotating shafts on two sides of the valve plate.
Furthermore, the rotating shaft on one side of the valve plate is fixed on the valve body through a bearing seat and a nut, and the rotating shaft on the other side of the valve plate is connected with an actuator for driving the rotating shaft to rotate.
Further, the air pipe is arranged on the sealing sleeve through a quick-connection plug.
The utility model adopts the air-tight mode to replace the graphite disk extrusion mode in the prior art, thereby having low requirement on the processing precision of the workpiece, opening the compressed air valve, filling compressed air between the rotating shaft and the sealing sleeve, and preventing the leakage of waste gas by forming positive pressure inside the rotating shaft and the sealing sleeve.
Drawings
Fig. 1 is a schematic cross-sectional structure of the present invention.
Fig. 2 is a view from a-a in fig. 1.
In the figure: 1. a rotating shaft; 2. sealing sleeves; 3. an air chamber; 4. an air tube; 5. a valve body; 6. a gland; 7. a valve plate; 8. a bearing seat; 9. a nut; 10. an actuator; 11. a quick connector.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, in the sleeve air sealing device for the rotary butterfly valve shaft, the seal between the rotary shaft and the sealing sleeve is realized by charging compressed air between the rotary shaft 1 and the sealing sleeve 2 of the butterfly valve.
Specifically, the butterfly valve includes valve body, valve plate and rotation axis, and the rotation axis is installed to the bilateral symmetry of valve plate, and the rotation axis 1 of valve plate 7 one side is fixed on the valve body through bearing frame 8 and nut 9, and the rotation axis of valve plate opposite side is connected with drive rotation axis pivoted executor 10. The actuator can drive the rotating shaft to rotate and further drive the valve plate to rotate, so that the butterfly valve is opened and closed.
Wherein the sealing sleeve 2 is arranged on the valve body 5 corresponding to the rotating shaft at two sides of the valve plate 7, the cross section of the sealing sleeve is reversely buckled on the rotating shaft in a Z shape, and the end part of the sealing sleeve is fixed with a gland 6 through a bolt, so that an air chamber 3 is formed between the sealing sleeve 2 and the rotating shaft 1. The gland cup joints on rotation axis 1, and seal cover 2 closes the uncovered of air chamber 3 side through the gland.
The corresponding air chamber on the sealing sleeve is connected with an air pipe 4 through a quick-connection-peg 11. The other end of the air pipe is connected with a compressed air production device, and a compressed air valve for controlling the opening and closing of the air pipe is arranged on the air pipe. When the air-compressing device is used, the air-compressing valve is opened, and compressed air is filled into the air chamber, so that positive pressure is formed in the air chamber, and the leakage of waste gas is prevented.
And the air chamber makes and forms the gas layer between seal cover and the rotation axis, reducible and the seal cover between the friction when the rotation axis is rotatory, make the rotation axis can be more nimble.
Because the rotation axis that the bilateral symmetry of valve plate set up, consequently also need set up cover gas sealing device symmetry and set up on the rotation axis 1 of valve plate 7 both sides to every cover gas sealing device corresponds every rotation axis and carries out cover gas sealing.
The above embodiments are not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make variations, modifications, additions or substitutions within the technical scope of the present invention.
Claims (7)
1. The utility model provides a cover air seal device for rotary butterfly valve axle which characterized in that: an air chamber (3) is arranged between the rotating shaft (1) and the sealing sleeve (2) of the butterfly valve, and the air chamber is filled with compressed air for sealing.
2. The housing air seal device for a rotary butterfly valve shaft according to claim 1, characterized in that: the air pipe (4) is connected to the sealing sleeve, and compressed air is filled into the air chamber through the air pipe.
3. The housing air-tight seal for a rotary butterfly valve shaft according to claim 2, characterized in that: the other end of the air pipe is connected with a compressed air production device, and a compressed air valve for controlling the air pipe to open and close is installed on the air pipe.
4. A sleeve air seal device for a rotary butterfly valve shaft according to claim 3, characterized in that: seal cover (2) are installed on valve body (5), and the tip of seal cover is fixed with gland (6) through the bolt, and the gland cup joints on rotation axis (1), and seal cover (2) close the uncovered of air chamber (3) side through gland (6).
5. The housing air-tight seal for a rotary butterfly valve shaft of claim 4, wherein: the sleeve air sealing devices are symmetrically arranged on the rotating shaft (1) at two sides of the valve plate (7).
6. The housing air-tight seal for a rotary butterfly valve shaft of claim 5, wherein: the rotary shaft (1) on one side of the valve plate (7) is fixed on the valve body through a bearing seat (8) and a nut (9), and the rotary shaft on the other side of the valve plate is connected with an actuator (10) for driving the rotary shaft to rotate.
7. The housing air-tight seal for a rotary butterfly valve shaft according to claim 2, characterized in that: the air pipe (4) is arranged on the sealing sleeve (2) through a quick-connection plug (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122135783.2U CN216201082U (en) | 2021-09-06 | 2021-09-06 | Sleeve air sealing device for rotary butterfly valve shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122135783.2U CN216201082U (en) | 2021-09-06 | 2021-09-06 | Sleeve air sealing device for rotary butterfly valve shaft |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216201082U true CN216201082U (en) | 2022-04-05 |
Family
ID=80916802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122135783.2U Expired - Fee Related CN216201082U (en) | 2021-09-06 | 2021-09-06 | Sleeve air sealing device for rotary butterfly valve shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216201082U (en) |
-
2021
- 2021-09-06 CN CN202122135783.2U patent/CN216201082U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220405 |