CN219888861U - Worm gear butterfly valve mechanical locking device - Google Patents
Worm gear butterfly valve mechanical locking device Download PDFInfo
- Publication number
- CN219888861U CN219888861U CN202320900592.7U CN202320900592U CN219888861U CN 219888861 U CN219888861 U CN 219888861U CN 202320900592 U CN202320900592 U CN 202320900592U CN 219888861 U CN219888861 U CN 219888861U
- Authority
- CN
- China
- Prior art keywords
- gear
- worm
- butterfly valve
- locking device
- mechanical locking
- 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.)
- Active
Links
- 238000007789 sealing Methods 0.000 claims description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009434 installation Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000010687 lubricating oil Substances 0.000 description 1
Landscapes
- Mechanically-Actuated Valves (AREA)
- Lift Valve (AREA)
Abstract
The mechanical locking device of the worm and gear butterfly valve comprises a first gear fixed on a worm operating rod, wherein the first gear is meshed with a second gear which is in sliding fit with a flat key on a mounting shaft and moves up and down along the axis direction of the mounting shaft; the outer side of the second gear is limited by a limiting nut, and the inner side of the second gear is ejected out by a pressure spring. The mechanical locking device for the worm and gear butterfly valve can effectively prevent the butterfly valve from closing back.
Description
Technical Field
The utility model relates to a worm and gear butterfly valve, in particular to a mechanical locking device of a worm and gear butterfly valve.
Background
The worm gear butterfly valve is widely applied to a technical water supply pipeline of a hydroelectric generating set, and three bearings and an air cooler pipeline of the hydroelectric generating set have strict requirements on cooling water flow. After the pressure reducing valve is regulated, the flow of the cooling water flow of the three-step bearing and the air cooler is regulated by a main pipe butterfly valve. Under the dual actions of water flow impact and pipeline vibration of the butterfly valve in the pipeline, the phenomenon of closing back of the butterfly valve can occur at irregular intervals, and if the water consumption of each part of the hydroelectric generating set is not treated, the water consumption can be reduced or cut off. The rapid temperature rise of all parts of the unit is initiated to jeopardize the safe and stable operation of the water-turbine generator unit, the overhaul workload of operation and maintenance personnel is increased, and meanwhile, the equipment maintenance cost is increased.
Disclosure of Invention
The technical problem to be solved by the utility model is to provide the mechanical locking device for the worm and gear butterfly valve, so that the butterfly valve can reliably and firmly lock the worm at any opening degree, and the butterfly valve can be effectively prevented from closing back.
In order to solve the technical problems, the utility model adopts the following technical scheme:
the mechanical locking device of the worm and gear butterfly valve comprises a first gear fixed on a worm operating rod, wherein the first gear is meshed with a second gear which is in sliding fit with a flat key on a mounting shaft and moves up and down along the axis direction of the mounting shaft; the outer side of the second gear is limited by a limiting nut, and the inner side of the second gear is ejected out by a pressure spring.
And one side of the second gear is provided with a magnet, and the magnet is adsorbed with the sealing end cover when the second gear moves downwards.
The utility model discloses a mechanical locking device of a worm and gear butterfly valve, which has the following technical effects:
1) The worm operating rod can be limited to rotate by adopting the gear mechanism or the locking screw, so that the purpose of locking is achieved, the closing of the butterfly valve can be effectively avoided, and the safe and stable operation of the hydroelectric generating set is ensured.
2) The device is simple and reliable, and the working intensity and maintenance cost of operation and maintenance personnel can be effectively reduced.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
fig. 1 is a front view of a worm and gear butterfly valve.
Fig. 2 is a left side view of a worm and gear butterfly valve.
FIG. 3 is a schematic diagram of the present utility model.
Fig. 4 is a cross-sectional view of a second gear installation in accordance with the present utility model.
In the figure: the worm operation rod 1, the first gear 2, the second gear 3, the mounting shaft 4, the flat key 5, the limit nut 6, the pressure spring 7, the sealing end cover 8, the worm gear 9, the end cover fastening bolt 10, the locking screw 11 and the magnet 12.
Detailed Description
As shown in fig. 1-2, the worm and gear butterfly valve comprises a worm and gear device 9, wherein the worm and gear device 9 is used for controlling the rotation of a butterfly valve plate. A sealing end cover 8 is arranged on one side of the worm gear device 9 by using an end cover fastening bolt 10, and the sealing end cover 8 is used for preventing lubricating oil in the transmission device from flowing out. A worm operation rod 1 is extended from one side of the sealing end cover 8, and the worm operation rod 1 is used for operating and adjusting the opening degree of the butterfly valve.
As shown in fig. 3-4, the mechanical locking device of the worm and gear butterfly valve comprises a first gear 2 fixedly arranged on the shaft of a worm operation rod 1, wherein one side of the worm operation rod 1 is provided with a mounting shaft 4, and the mounting shaft 4 is fixed on a sealing end cover 8 through a screw. The side wall of the installation shaft 4 is grooved, a flat key 5 with a certain length is embedded in the groove, and the second gear 3 passes through the installation shaft 4 and moves linearly back and forth along the axis direction of the installation shaft 4 by positioning the flat key 5. The mounting shaft 4 positioned on the left side of the second gear 3 is provided with external threads, the limit nut 6 is in threaded connection with the mounting shaft 4, the mounting shaft 4 positioned on the right side of the second gear 3 is sleeved with the pressure spring 7, and the pressure spring 7 tightly pushes the second gear 3 against the limit nut 6. The second gear 3 is meshed with the first gear 2.
In a normal state, the second gear 3 cannot rotate, the first gear 2 meshed with the second gear 3 cannot rotate, and the worm operating rod 1 coaxially installed with the first gear 2 cannot rotate, so that the purpose of locking is achieved, and the butterfly valve is prevented from being closed.
When the worm operation rod 1 is required to be operated, the second gear 3 can be moved to one side of the sealing end cover 8, the second gear 3 is disengaged from the first gear 2, the worm operation rod 1 can be freely rotated, and the opening degree of the butterfly valve can be conveniently adjusted.
In order to facilitate the operation of the worm operation lever 1, a magnet 12 may be provided on the second gear 3 side, and the magnet 12 may be attracted to the seal cap 8 when the second gear 3 moves down. This eliminates the need for a person to constantly press the second gear 3.
As shown in fig. 1-2, another way to lock the worm operating rod 1 is to make a threaded hole on the side wall of the seal end cover 8, install a locking screw 11 in the threaded hole, and when the locking screw 11 is screwed, the end of the locking screw can prop against the worm to prevent the worm from rotating. Before the opening degree of the butterfly valve is regulated, the locking screw 11 is loosened, the locking screw is separated from the worm gear device 9, the opening degree of the butterfly valve is regulated to a proper position, the locking screw 11 is screwed, the end part of the locking screw 11 is tightly pressed against the worm, and the valve has self-locking capability under the dual effects of water flow impact and pipeline vibration.
Claims (2)
1. The utility model provides a worm gear butterfly valve mechanical locking device which characterized in that: the worm gear comprises a first gear (2) fixed on a worm operation rod (1), wherein the first gear (2) is meshed with a second gear (3), and the second gear (3) is in sliding fit with a flat key (5) on a mounting shaft (4) and moves up and down along the axis direction of the mounting shaft (4); the outer side of the second gear (3) is limited by a limiting nut (6), and the inner side of the second gear (3) is ejected out by a pressure spring (7).
2. The mechanical locking device of a worm and gear butterfly valve according to claim 1, wherein: one side of the second gear (3) is provided with a magnet (12), and the magnet (12) is adsorbed with the sealing end cover (8) when the second gear (3) moves downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320900592.7U CN219888861U (en) | 2023-04-20 | 2023-04-20 | Worm gear butterfly valve mechanical locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320900592.7U CN219888861U (en) | 2023-04-20 | 2023-04-20 | Worm gear butterfly valve mechanical locking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219888861U true CN219888861U (en) | 2023-10-24 |
Family
ID=88408523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320900592.7U Active CN219888861U (en) | 2023-04-20 | 2023-04-20 | Worm gear butterfly valve mechanical locking device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219888861U (en) |
-
2023
- 2023-04-20 CN CN202320900592.7U patent/CN219888861U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |