CN216382807U - Valve rod adjusting structure - Google Patents
Valve rod adjusting structure Download PDFInfo
- Publication number
- CN216382807U CN216382807U CN202122499828.4U CN202122499828U CN216382807U CN 216382807 U CN216382807 U CN 216382807U CN 202122499828 U CN202122499828 U CN 202122499828U CN 216382807 U CN216382807 U CN 216382807U
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- end cover
- adjusting
- valve
- screw rod
- screw
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Abstract
A valve rod adjusting structure comprises an adjusting screw rod fixedly connected with a valve rod and a lower end cover fixedly connected with a valve body, wherein a groove is formed in the adjusting screw rod, a semi-ring sheet is clamped on the groove, and the semi-ring sheet is fixedly connected with the valve rod through a connecting screw; the lower end cover is provided with an adjusting threaded hole matched with the adjusting screw rod, the lower end cover is screwed on the adjusting screw rod through the adjusting threaded hole and is fixedly connected with the valve body through a fixing screw, a locking nut is further screwed on the adjusting screw rod on the outer side of the lower end cover, and a protective cover is further mounted on the lower end cover at the position of the adjusting threaded hole. The structure is easy to assemble and high in adjusting precision, so that the valve rod cannot move up and down under the action of medium pressure in the using process, and the valve can be well applied to valves such as butterfly valves, eccentric half-ball valves, piston type flow adjusting valves and the like.
Description
Technical Field
The utility model relates to the field of machinery, in particular to a valve, and particularly relates to a valve rod adjusting structure.
Background
At present, in valves such as butterfly valves and the like, in order to prevent a valve rod from moving up and down due to the action of pressure, a split ring is installed at the tail part of a lower valve rod, or a packing gland presses a step in the middle of the upper valve rod to limit the valve rod, however, no matter which mode is adopted, when one part size among a valve body, a valve plate, the valve rod and the lower end cover has processing deviation, the valve rod or the split ring and other parts need to be reworked, and are easily blocked or do not work.
Disclosure of Invention
The utility model aims to solve the technical problem of the prior art and provides a valve rod adjusting structure which is simple in structure, high in adjusting precision and easy to assemble.
The technical problem to be solved by the utility model is realized by the following technical scheme that the valve rod adjusting structure comprises an adjusting screw rod fixedly connected with a valve rod and a lower end cover fixedly connected with a valve body, wherein a groove is formed in the adjusting screw rod, a semi-ring sheet is clamped on the groove, and the semi-ring sheet is fixedly connected with the valve rod through a connecting screw; the lower end cover is provided with an adjusting threaded hole matched with the adjusting screw rod, the lower end cover is screwed on the adjusting screw rod through the adjusting threaded hole and is fixedly connected with the valve body through a fixing screw, a locking nut is further screwed on the adjusting screw rod on the outer side of the lower end cover, and a protective cover is further mounted on the lower end cover at the position of the adjusting threaded hole.
Furthermore, the connecting screw is an outer hexagon screw, and the fixing screw is an inner hexagon screw.
Furthermore, the connecting screw and the fixing screw are both stainless steel screws.
Furthermore, an end cover sealing groove is further formed in the lower end cover on the valve body side, and an end cover sealing ring is installed in the end cover sealing groove.
Furthermore, a screw sealing groove is arranged on the adjusting screw at the position of the adjusting threaded hole, and a screw sealing ring is arranged in the screw sealing groove.
Furthermore, the end cover sealing ring and the screw rod sealing ring are both O-shaped rings.
Furthermore, an external thread is arranged on the lower end cover at the position of the adjusting threaded hole, and an internal thread matched with the external thread is arranged on the protective cover.
Compared with the prior art, the utility model has the beneficial effects that:
(1) standardization of main parts: the standardized production of accessories such as the valve rod, the valve body, the lower end cover and the like is realized, and the subsequent reworking is not needed;
(2) during a sealing pressure test, the position of the valve plate can be adjusted on line on an operation table, so that the work of hoisting, dismounting and the like is greatly reduced, the working strength is reduced, and the overall test time is reduced;
(3) under the on-site working condition, the valve rod can not move up and down after being locked, and the valve rod is fixedly connected with the valve plate, so that the valve can not leak at the main sealing position due to the fact that the valve rod moves up and down.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Examples
Referring to fig. 1, a valve rod adjusting structure includes an adjusting screw 3 and a lower end cap 5, the adjusting screw 3 is used for being fixedly connected with a valve rod 9, so as to facilitate adjusting operation of the valve rod 9 by the adjusting screw 3, the lower end cap 5 is used for being fixedly connected with a valve body 11, so as to facilitate protection of the adjusting screw 3 and match rotation of the adjusting screw 3;
a groove is formed in the adjusting screw rod 3, a semi-ring piece 7 is clamped on the groove, and the semi-ring piece 7 is fixedly connected with the valve rod 9 through a connecting screw 10, so that the fixed connection between the adjusting screw rod 3 and the valve rod 9 is realized, and the action adjustment of the valve rod 9 through the adjusting screw rod 3 is facilitated; the lower end cover 5 is provided with an adjusting threaded hole matched with the adjusting screw rod 3, and the lower end cover 5 is screwed on the adjusting screw rod 3 through the adjusting threaded hole and is fixedly connected with the valve body 11 through a fixing screw 12; the adjusting threaded hole can position and guide the adjusting screw rod 3 and is convenient for the adjusting screw rod 3 to rotate and adjust, and a locking nut 2 is screwed on the adjusting screw rod 3 outside the lower end cover 5 and is used for locking and fixing the adjusting screw rod 3 after the adjusting screw rod is adjusted in place, so that the valve rod 9 is locked;
in order to protect the adjusting screw rod 3 and the locking nut 2 exposed outside the lower end cover 5, the lower end cover 5 at the adjusting threaded hole is also provided with a protective cover 1 for isolating and protecting the adjusting screw rod 3 and the locking nut 2 from the outside.
The connecting screw 10 is a stainless steel outer hexagon screw, and the fixing screw 12 is a stainless steel inner hexagon screw, so that the connecting screw is firm and reliable, and the service life is long.
An end cover sealing groove is further formed in the lower end cover 5 on the side of the valve body 11, an end cover sealing ring 6 is installed in the end cover sealing groove, and the end cover sealing ring is used for sealing a gap between the lower end cover 5 and the valve body 11 after the lower end cover 5 is installed on the valve body 11, so that sealing performance is guaranteed.
A screw sealing groove is formed in the adjusting screw 3 at the position of the adjusting threaded hole, and a screw sealing ring 4 is installed in the screw sealing groove and used for sealing a gap between the screw and the adjusting threaded hole to guarantee sealing performance.
The end cover sealing ring 6 and the screw rod sealing ring 4 are both O-shaped rings, the O-shaped rings are rubber sealing rings with circular cross sections, and the rubber sealing rings have the advantages of low price, simplicity in manufacturing and reliability in function, are simple in installation requirement and are convenient to use.
In order to facilitate the rapid installation of the protective cover 1 on the lower end cover 5, an external thread is arranged on the lower end cover 5 at the position of the adjusting threaded hole, an internal thread matched with the external thread is arranged on the protective cover 1, and the protective cover 1 can be rapidly assembled and disassembled through the matching of the internal thread and the external thread.
When the valve rod adjusting device is used, after a valve rod 9 is installed in a lower shaft hole of a valve body 11 through a copper bearing 8, an adjusting screw rod 3 is installed in a tail hole of the valve rod 9, a semi-ring plate 7 is clamped in a groove on the adjusting screw rod 3, then a connecting screw 10 penetrates through a unthreaded hole on the semi-ring plate 7 and is screwed into a threaded hole on the valve rod 9, and the connecting screw 10 is screwed tightly, so that the adjusting screw rod 3 and the valve rod 9 are connected together;
then, a screw seal ring 4 is arranged in a screw seal groove of an adjusting screw 3, an end cover seal ring 6 is arranged in an end cover seal groove of a lower end cover 5, an adjusting threaded hole on the lower end cover 5 is screwed by an external thread of the adjusting screw 3 until the lower end cover 5 is tightly contacted with a valve body 11, a fixing screw 12 penetrates through a unthreaded hole of the lower end cover 5 and is screwed into a threaded hole on the valve body 11, and the fixing screw 12 is screwed tightly, so that the lower end cover 5 and the valve body 11 are connected together;
then, the square head at the tail part of the adjusting screw rod 3 is rotated by a spanner, the position of the valve rod 9 is adjusted, after the ideal position is reached, the locking nut 2 is screwed on the adjusting screw rod 3, and the adjusting screw rod 3 is locked until the locking nut is screwed tightly;
finally, the protective cover 1 is screwed on the lower end cover 5 until being screwed;
when the position of the valve rod 9 needs to be adjusted, the protective cover 1 is unscrewed firstly, then the locking nut 2 is loosened, the tail square head of the adjusting screw rod 3 is screwed by a wrench, clockwise upwards and anticlockwise downwards, when the required position is adjusted, the locking nut 2 is screwed tightly, and the protective cover 1 is installed.
Claims (7)
1. A valve rod adjusting structure is characterized in that: the valve comprises an adjusting screw fixedly connected with a valve rod and a lower end cover fixedly connected with a valve body, wherein a groove is formed in the adjusting screw, and a semi-ring sheet is clamped on the groove and fixedly connected with the valve rod through a connecting screw; the lower end cover is provided with an adjusting threaded hole matched with the adjusting screw rod, the lower end cover is screwed on the adjusting screw rod through the adjusting threaded hole and is fixedly connected with the valve body through a fixing screw, a locking nut is further screwed on the adjusting screw rod on the outer side of the lower end cover, and a protective cover is further mounted on the lower end cover at the position of the adjusting threaded hole.
2. The valve stem adjustment structure according to claim 1, wherein: the connecting screw is an outer hexagon screw, and the fixing screw is an inner hexagon screw.
3. The valve stem adjustment structure according to claim 1 or 2, wherein: the connecting screw and the fixing screw are both stainless steel screws.
4. The valve stem adjustment structure according to claim 1, wherein: an end cover sealing groove is also arranged on the lower end cover on the valve body side, and an end cover sealing ring is arranged in the end cover sealing groove.
5. The valve stem adjustment structure according to claim 4, wherein: and a screw rod sealing groove is arranged on the adjusting screw rod at the position of the adjusting threaded hole, and a screw rod sealing ring is arranged in the screw rod sealing groove.
6. The valve stem adjustment structure according to claim 5, wherein: the end cover sealing ring and the screw rod sealing ring are both O-shaped rings.
7. The valve stem adjustment structure according to claim 1, wherein: the lower end cover at the position of the adjusting threaded hole is provided with an external thread, and the protective cover is provided with an internal thread matched with the external thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122499828.4U CN216382807U (en) | 2021-10-18 | 2021-10-18 | Valve rod adjusting structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122499828.4U CN216382807U (en) | 2021-10-18 | 2021-10-18 | Valve rod adjusting structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216382807U true CN216382807U (en) | 2022-04-26 |
Family
ID=81245196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122499828.4U Active CN216382807U (en) | 2021-10-18 | 2021-10-18 | Valve rod adjusting structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216382807U (en) |
-
2021
- 2021-10-18 CN CN202122499828.4U patent/CN216382807U/en active Active
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