CN218719129U - Valve cover for straight-stroke valve - Google Patents
Valve cover for straight-stroke valve Download PDFInfo
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- CN218719129U CN218719129U CN202223104890.XU CN202223104890U CN218719129U CN 218719129 U CN218719129 U CN 218719129U CN 202223104890 U CN202223104890 U CN 202223104890U CN 218719129 U CN218719129 U CN 218719129U
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- valve
- sealing
- driving nut
- valve cover
- elastic piece
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Abstract
The utility model discloses a valve cover for a straight stroke valve, which comprises a valve cover and a valve rod; the upper end of the valve cover is provided with an upper driving nut, and the lower end of the valve cover is provided with a lower driving nut; a sealing filler is arranged between the upper driving nut and the lower driving nut; one end of the sealing filler is abutted against the upper driving nut through a first elastic piece, and the other end of the sealing filler is abutted against the lower driving nut through a second elastic piece; the valve rod is in threaded fit with the upper driving nut and the lower driving nut. Based on this, when the valve was closed, the release of second elastic component, first elastic component compressed tightly, and the middle part sealing at gland packing dependence its middle part is contradicted with the valve gap inner wall, and gland packing's upper and lower sealing does not participate in sealedly to reduced gland packing to the friction of valve rod, reduced the opening of valve and closed moment, also protected gland packing, makeed the valve can permanent airtight reduction need not maintain even.
Description
Technical Field
The utility model relates to the technical field of valves, specifically be a valve gap that straight stroke valve used.
Background
At present, in domestic straight stroke valves (such as gate valves and stop valves), because the valves are opened and closed by means of the fact that valve rods move up and down and drive valve sealing elements (flashboards and valve clacks) to move, the purpose of opening or closing the valves is achieved, and because the valve rods penetrate through valve covers, and meanwhile, the valve sealing elements are connected with driving elements (hand wheels, actuators and the like), leakage points exist between the valve rods and the valve covers.
At present, in order to solve the sealing problem, a method of sealing packing is generally adopted at home and abroad, and the valve rod continuously moves up and down in the using process to damage the sealing packing, so that the sealing is ineffective.
Because the artificial compression bolt is a post-accident remedy measure, and leakage of pipeline media can be caused under certain specific working conditions (such as toxic, harmful, inflammable and explosive media), so that safety accidents and personal injuries are caused, foreign enterprises begin to explore the fact that an elastic part is added on the lower portion of the existing packing bolt, the elastic part is used for automatically compensating the damaged packing sealing portion, and due to the fact that the elastic part is added, the packing is always in a high-pressure state, friction force of the valve rod moving up and down is increased, and the damage speed of the packing is accelerated.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a valve gap that straight stroke valve used to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a valve cover for a straight stroke valve comprises a valve cover and a valve rod; an upper driving nut is arranged at the upper end of the valve cover, and a lower driving nut is arranged at the lower end of the valve cover; a sealing filler is arranged between the upper driving nut and the lower driving nut; one end of the sealing filler is connected with the upper driving nut through a first elastic piece, and the other end of the sealing filler is connected with the valve rod through a second elastic piece; the valve rod is in threaded fit with the upper driving nut and the lower driving nut.
As the utility model discloses a preferred technical scheme: the seal packing includes a middle seal portion; one surface of the middle sealing part is connected with the upper sealing part, and the other surface of the middle sealing part is connected with the lower sealing part.
As the utility model discloses a preferred technical scheme: the middle sealing part is made of a woven material, and the upper sealing part and the lower sealing part are made of flexible materials.
As the utility model discloses an preferred technical scheme: the upper sealing part is connected with one end of the first elastic piece through a first gasket, and the lower sealing part is connected with the second elastic piece through a second gasket.
As the utility model discloses an preferred technical scheme: the valve rod is further provided with a step surface, and one end, far away from the sealing filler, of the second elastic piece abuts against the step surface.
As the utility model discloses a preferred technical scheme: the first elastic piece and the second elastic piece are springs.
Adopt above-mentioned technical scheme, the beneficial effects of the utility model are that: through the position that changes packing, packing moves to the valve gap middle part promptly, both ends at the valve gap all set up drive nut simultaneously, and set up the elastic component at packing's both ends, second elastic component atress in the valve gap when the valve rod moves up, the valve rod shifts up compression second elastic component this moment, make the increase of second elastic component atress, thereby increase packing's sealing force, simultaneously because the valve rod shifts up, first elastic component compression space in the valve gap enlargies, first elastic component relaxs, the friction of packing to the valve rod has been reduced, thereby effectual protection packing, increase packing's life-span.
Drawings
FIG. 1 is a schematic view of the main structure of the present invention;
fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.
In the figure: 1. an upper drive nut; 2. a first elastic member; 3. sealing and filling; 30. a second gasket; 31. a lower sealing part; 32. a middle sealing part; 33. an upper sealing part; 34. a first gasket; 4. a second elastic member; 5. a valve stem; 6. a lower drive nut; 7. a valve cover; 8. a step surface.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "upper surface", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Referring to fig. 1-2, the present invention provides an embodiment: a valve cover for a straight stroke valve comprises a valve cover 7 and a valve rod 5; the upper end of the valve cover 7 is provided with an upper driving nut 1, and the lower end of the valve cover 7 is provided with a lower driving nut 6; a sealing filler 3 is arranged between the upper driving nut 1 and the lower driving nut 6; one end of the sealing filler 3 is connected with the upper driving nut 1 through a first elastic piece 2, and the other end of the sealing filler 3 is connected with the valve rod 5 through a second elastic piece 4; the valve rod 5 is in threaded fit with the upper drive nut 1 and the lower drive nut 6.
In conclusion, by changing the position of the sealing filler 3, that is, the sealing filler 3 moves to the middle of the valve cover 7, the two ends of the valve cover 7 are respectively provided with the driving nut, and the two ends of the sealing filler 3 are provided with the elastic parts, when the valve rod 5 moves upwards, the second elastic part 4 in the valve cover 7 is stressed, at the moment, the valve rod 5 moves upwards to compress the second elastic part 4, so that the stress of the second elastic part 4 is increased, thereby increasing the sealing force of the sealing filler 3, and meanwhile, as the valve rod 5 moves upwards, the compression space of the first elastic part 2 in the valve cover 7 is enlarged, the first elastic part 2 is loosened, the friction of the sealing filler 3 on the valve rod 5 is reduced, thereby effectively protecting the sealing filler 3 and prolonging the service life of the sealing filler 3.
In order to further enhance the sealing performance of the sealing packing 3, the sealing packing 3 includes a middle sealing portion 32; one surface of the middle sealing part 32 is connected to the upper sealing part 33, and the other surface of the middle sealing part 32 is connected to the lower sealing part 31.
When the valve is closed, the valve rod 5 moves downwards, the second elastic part 4 is released, the first elastic part 2 is compressed, and the long-stroke elastic part is adopted, so that the stress of the elastic part is small in the initial stage of opening or closing and in a half stroke of the valve, and the sealing filler 3 seals the valve cover 7 by virtue of the middle sealing part 32; at the moment, the upper sealing part 33 and the lower sealing part 31 do not participate in sealing, so that the friction of the sealing filler 3 on the valve rod 5 is reduced, the opening and closing torque of the valve is reduced, the sealing filler 3 is also protected, and the valve can be free of maintenance for life.
Further, the middle sealing portion 32 is made of a woven material, and the upper sealing portion 33 and the lower sealing portion 31 are made of a flexible material. Such as a flexible graphite material.
Further, the upper sealing portion 33 is connected to one end of the first elastic member 2 by a first gasket 34, and the lower sealing portion 31 is connected to the second elastic member 4 by a second gasket 30.
With the above-described arrangement, by combining the seal packings 3, i.e., the upper seal portion 33, the middle seal portion 32, and the lower seal portion 31; the upper seal 33 is connected to the first elastic member 2 via the first gasket 34, the lower seal 31 is connected to the second gasket 30 via the second elastic member 4, and the two metal gaskets receive the elastic force of the elastic members to urge the upper seal 33 and the lower seal 31 to be elastically deformed, thereby sealing the valve rod 5.
Wherein: the middle sealing part 32 is a reinforcing woven packing, and is sealed with the valve rod 5 and simultaneously stabilizes the upper sealing part 33 and the lower sealing part 31 which are made of flexible materials, so that the internal sealing of the valve cover 7 is more stable and reliable. Specifically, the first elastic member 2 and the second elastic member 4 are springs.
On the basis of the scheme, a step surface 8 is further arranged on the valve rod 5, and one end, far away from the sealing packing 3, of the second elastic piece 4 abuts against the step surface 8. The length of the second elastic member 4 can be shortened.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is to be accorded the full scope of the claims.
Claims (6)
1. The utility model provides a valve gap that straight stroke valve used which characterized in that: comprises a valve cover (7) and a valve rod (5);
an upper driving nut (1) is arranged at the upper end of the valve cover (7), and a lower driving nut (6) is arranged at the lower end of the valve cover (7); a sealing filler (3) is arranged between the upper driving nut (1) and the lower driving nut (6);
one end of the sealing packing (3) is connected with the upper driving nut (1) through a first elastic piece (2), and the other end of the sealing packing (3) is connected with the valve rod (5) through a second elastic piece (4);
the valve rod (5) is in threaded fit with the upper driving nut (1) and the lower driving nut (6).
2. A valve cover for a straight stroke valve as claimed in claim 1, wherein: the sealing packing (3) comprises a middle sealing part (32); one surface of the middle sealing part (32) is connected with an upper sealing part (33) which is arranged, and the other surface of the middle sealing part (32) is connected with a lower sealing part (31) which is arranged.
3. A valve cover for a straight stroke valve as claimed in claim 2, wherein: the middle sealing part (32) is made of a woven material, and the upper sealing part (33) and the lower sealing part (31) are made of flexible materials.
4. A valve cover for a straight stroke valve as claimed in claim 3, wherein: the upper sealing portion (33) is connected with one end of the first elastic piece (2) through a first gasket (34) which is arranged, and the lower sealing portion (31) is connected with the second elastic piece (4) through a second gasket (30) which is arranged.
5. A valve cover for a straight stroke valve according to any one of claims 1 to 4, wherein: the valve rod (5) is further provided with a step surface (8), and one end, far away from the sealing filler (3), of the second elastic piece (4) abuts against the step surface (8).
6. A valve cover for a straight stroke valve as claimed in claim 5, wherein: the first elastic piece (2) and the second elastic piece (4) are springs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223104890.XU CN218719129U (en) | 2022-11-23 | 2022-11-23 | Valve cover for straight-stroke valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223104890.XU CN218719129U (en) | 2022-11-23 | 2022-11-23 | Valve cover for straight-stroke valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218719129U true CN218719129U (en) | 2023-03-24 |
Family
ID=85622457
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223104890.XU Active CN218719129U (en) | 2022-11-23 | 2022-11-23 | Valve cover for straight-stroke valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218719129U (en) |
-
2022
- 2022-11-23 CN CN202223104890.XU patent/CN218719129U/en active Active
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| GR01 | Patent grant |