CN222616124U - Air valve of exhaust cylinder of steam turbine - Google Patents
Air valve of exhaust cylinder of steam turbine Download PDFInfo
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- CN222616124U CN222616124U CN202421072403.2U CN202421072403U CN222616124U CN 222616124 U CN222616124 U CN 222616124U CN 202421072403 U CN202421072403 U CN 202421072403U CN 222616124 U CN222616124 U CN 222616124U
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- valve
- cover
- steam turbine
- connecting seat
- asbestos rubber
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Abstract
The utility model relates to the technical field of steam turbine exhaust cylinders, in particular to a steam turbine exhaust cylinder air valve which comprises a valve casing, wherein a valve port is formed in the valve casing, a second valve cover is arranged in the valve port, a first connecting seat is arranged on the outer surface of the valve casing, a second connecting seat is arranged on the outer surface of the second valve cover, the first connecting seat is detachably connected with one end of a connecting rod, the second connecting seat is detachably connected with the other end of the connecting rod, a second asbestos rubber plate is arranged on the outer surface of the valve casing, and the second asbestos rubber plate can cover the outer surface of the second valve cover. In the utility model, the valve shell is connected with the second valve cover through the connecting rod, after the second valve cover is closed, under the connecting action of the connecting rod, the second valve cover is firm and stable, the second asbestos rubber plate is not damaged, a temporary gasket is not required to be additionally arranged, repeated installation and disassembly are not required, repeated procedures are reduced, and the construction period is shortened.
Description
Technical Field
The utility model relates to the technical field of steam turbine exhaust cylinders, in particular to an atmospheric valve of a steam turbine exhaust cylinder.
Background
The exhaust cylinder air valve of the steam turbine is a safety protection facility of a vacuum system. The condenser cooling water of the condensing type turbine unit is suddenly interrupted, the absolute pressure of the exhaust steam can exceed one atmosphere, and when the steam pressure is too high, the exhaust cylinder air valve is opened to discharge the steam in the turbine and the condenser to the atmosphere, so that the condenser and the exhaust cylinder are protected.
Referring to fig. 1, the prior art exhaust cylinder air valve mainly comprises a compression ring 3, a first valve cover 7, a first asbestos rubber plate 6 with the diameter of 1mm, and the like, wherein a valve seat 9 cast by gray cast iron is provided with the first valve cover 7, the compression ring 3 and the first asbestos rubber plate 6 arranged between the compression ring 3 and the first valve cover 7. Under normal vacuum condition, the first asbestos rubber plate 6 is pressed by external atmosphere to be pressed on the first valve cover 7, when the vapor pressure in the exhaust cylinder is raised to a certain value, the vapor pressure in the exhaust cylinder acts on the first valve cover 7, and the shearing force formed by the first valve cover 7 and the pressing ring 3 breaks the first asbestos rubber plate 6, so that the vapor is discharged to the atmosphere. A limited range cover 8 is arranged on the atmospheric valve of the exhaust cylinder, so that the first valve cover 7 and the first asbestos rubber plate 6 can be prevented from flying out when the atmospheric valve acts. The distance cover 8 is mounted on the valve seat 9 through the first studs 2 and the first nuts 1 on the two sides, and the first studs 2 press the first asbestos rubber plate 6 on the outer surface of the first valve cover 7. When the hydraulic cylinder test and transportation are carried out by a steam turbine manufacturer, a temporary gasket 5 is arranged above the first asbestos rubber plate 6, the temporary gasket 5 can press the first asbestos rubber plate 6 and the first valve cover 7, the first valve cover 7 is stabilized, and the first asbestos rubber plate 6 is protected from damage. An asbestos rubber plate gasket 4 is also installed between the top of the temporary gasket 5 and the distance cover 8. The temporary washer 5 must be removed during installation, otherwise the protection of the atmosphere valve is lost.
Therefore, when the exhaust cylinder air valve in the prior art is used for carrying out cylinder transportation, the temporary gasket 5 for protecting the first asbestos rubber plate 6 needs to be installed, however, when the exhaust cylinder air valve is installed on site, the temporary gasket 5 needs to be removed, otherwise, the protection function of the air valve is lost, the repeated assembly and disassembly cause complex procedures, and the construction period is influenced.
Disclosure of utility model
The utility model provides a steam turbine exhaust cylinder atmospheric valve, which aims to solve the technical problems that in the prior art, when a cylinder is transported, a temporary gasket for protecting an asbestos rubber plate needs to be installed, however, when the steam turbine exhaust cylinder atmospheric valve is installed on site, the temporary gasket needs to be taken down, otherwise, the protection effect of the atmospheric valve is lost, the repeated loading and unloading cause complex procedures, and the construction period is influenced.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
The air valve of the exhaust cylinder of the steam turbine comprises a valve shell, wherein the valve shell is provided with a valve port, a second valve cover is arranged in the valve port, a first connecting seat is arranged on the outer surface of the valve shell, a second connecting seat is arranged on the outer surface of the second valve cover, the first connecting seat is detachably connected with one end of a connecting rod, the second connecting seat is detachably connected with the other end of the connecting rod, a second asbestos rubber plate is arranged on the outer surface of the valve shell, and the second asbestos rubber plate can cover the outer surface of the second valve cover.
By adopting the above structural scheme, under the condition of normal vacuum, the second asbestos rubber plate is tightly pressed on the outer surface of the second valve cover. When the vapor pressure in the exhaust cylinder rises to a certain value, the vapor pressure in the exhaust cylinder acts on the second valve cover to burst the second asbestos rubber plate, so that the vapor is discharged to the atmosphere. The valve casing is in the same place through the connecting rod with the second valve gap, closes the second valve gap after, under the connecting action of connecting rod, when transportation and hydrostatic test, the second valve gap is also firm stable, can not damage the second asbestos rubber sheet, need not to install the temporary washer additional, need not to install repeatedly and dismantle, reduces repetition process, shortens the time limit for a project.
As a preferable implementation mode of the air valve of the steam turbine exhaust cylinder, the outer surface of the second valve cover is provided with a plurality of inner pressure rings, the inner pressure rings are arranged on the second valve cover through second double-head screw columns, one end of each second double-head screw column extending out of the outer surface of the second valve cover is provided with a second nut, each inner pressure ring is tightly pressed between the second nut and the second valve cover, the outer surface of the valve housing is provided with a plurality of outer pressure rings, each outer pressure ring is arranged on the outer surface of the valve housing through a third double-head screw column, one end of each third double-head screw column extending out of the outer surface of the valve housing is provided with a second nut, each outer pressure ring is tightly pressed between the second nut and the valve housing, the second double-head screw column and the third double-head screw column penetrate through second asbestos rubber plates, each third asbestos rubber plate is tightly pressed between the inner pressure rings and the second valve cover, and each third asbestos rubber plate is tightly pressed between each outer pressure ring and the valve housing.
As a preferable implementation mode of the exhaust cylinder atmospheric valve of the steam turbine, the first connecting seat is connected with one end of the connecting rod through a pin shaft, and the second connecting seat is connected with the other end of the connecting rod through a pin shaft.
By adopting the structural scheme, the connecting mode is simple and the cost is lower.
As a preferred implementation of the exhaust gas valve of the steam turbine, the first connecting seat is gradually enlarged in size in a direction approaching the valve housing, and the second connecting seat is gradually enlarged in size in a direction approaching the second valve cover.
By adopting the structural scheme, the firmness of the first connecting seat and the second connecting seat is improved.
As a preferred implementation of the atmospheric valve of the exhaust gas cylinder of the steam turbine, the side wall of the second valve cover abutting the valve port is gradually contracted in the direction toward the inside of the valve housing.
By adopting the structural scheme, the valve port can limit the second valve cover after the second valve cover is in butt joint with the valve port, so that the second valve cover is firmer and more stable.
As a preferred implementation mode of the exhaust cylinder atmospheric valve of the steam turbine, a plurality of internal pressure rings are arranged in a circumferential array manner.
As a preferable implementation mode of the exhaust cylinder atmospheric valve of the steam turbine, a plurality of external pressing rings are arranged in a circumferential array.
As a preferred implementation mode of the exhaust cylinder air valve of the steam turbine, an asbestos rubber ring is connected to the inner surface of the valve casing, one end of all third studs penetrating through the inner surface of the valve casing penetrates through an opening on the asbestos rubber ring, and the third studs are in interference connection with the opening on the asbestos rubber ring.
By adopting the structural scheme, the asbestos rubber ring plays a role in sealing.
As a preferred implementation of the exhaust gas valve of the steam turbine, the second connection is located in the center of the second valve cover.
By adopting the structural scheme, the stability of the second valve cover is enhanced.
As a preferred implementation of the exhaust gas valve of the steam turbine, a protective cover is connected to the outer surface of the valve housing, which surrounds the second valve cover.
By adopting the structural scheme, the protective cover can prevent the second valve cover from flying to the periphery.
The beneficial effects of the utility model include:
Under normal vacuum condition, the second asbestos rubber plate is pressed on the outer surface of the second valve cover. When the vapor pressure in the exhaust cylinder rises to a certain value, the vapor pressure in the exhaust cylinder acts on the second valve cover to burst the second asbestos rubber plate, so that the vapor is discharged to the atmosphere. The valve casing is in the same place through the connecting rod with the second valve gap, closes the second valve gap after, under the connecting action of connecting rod, when transportation and hydrostatic test, the second valve gap is also firm stable, can not damage the second asbestos rubber sheet, need not to install the temporary washer additional, need not to install repeatedly and dismantle, reduces repetition process, shortens the time limit for a project.
Drawings
In order to more clearly illustrate the technical solutions of the present utility model, the drawings that are needed in the description will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a prior art semi-sectional structure of an atmospheric valve of a steam turbine exhaust;
FIG. 2 is a schematic diagram showing a semi-sectional structure of an atmospheric valve of a steam turbine exhaust in an embodiment of the utility model.
List of parts and reference numerals:
1. A first nut; 2, a first stud, 3, a compression ring, 4, an asbestos rubber plate gasket, 5, a temporary gasket, 6, a first asbestos rubber plate, 7, a first valve cover, 8, a range hood, 9, and a valve seat;
10. The valve comprises a valve shell, 11, a pin shaft, 12, a connecting rod, 13, a second valve cover, 14, a second asbestos rubber plate, 15, an inner pressing ring, 16, a second stud, 17, a second nut, 18, an outer pressing ring, 19, a third stud, 20, a protective cover, 21 and an asbestos rubber ring.
Detailed Description
In order to make the objects, features and advantages of the present utility model more obvious and understandable, the technical solutions of the present utility model will be clearly and completely described below with reference to the drawings in this specific embodiment, and it is apparent that the embodiments described below are only some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 2, this embodiment proposes a steam turbine exhaust cylinder atmospheric valve, including a valve casing 10, the valve casing 10 is opened with the valve port, installs second valve gap 13 in the valve port, and the lateral wall of second valve gap 13 with the butt joint of valve port contracts gradually along the direction to the inside of valve casing 10, and the butt joint face of second valve gap 13 and valve port is the reverse conical surface, can carry out spacing to second valve gap 13, makes second valve gap 13 more firm stable. The first connecting seat is installed to the surface of valve casing 10, and the size of first connecting seat expands gradually along the direction that is close to valve casing 10, and the second connecting seat is installed to the surface of second valve gap 13, and the second connecting seat is located the central authorities of second valve gap 13, and the size of second connecting seat expands gradually along the direction that is close to second valve gap 13, and first connecting seat is connected through round pin axle 11 with the one end of connecting rod 12, and the second connecting seat is connected through round pin axle 11 with the other end of connecting rod 12.
The outer surface of the second valve cover 13 is provided with a plurality of inner pressure rings 15, the inner pressure rings 15 are arranged in a circumferential array manner, the inner pressure rings 15 are arranged on the second valve cover 13 through second double-head screw columns 16, one end of the second double-head screw columns 16 extending out of the outer surface of the second valve cover 13 is provided with a second nut 17, and the inner pressure rings 15 are tightly pressed between the second nut 17 and the second valve cover 13. The outer surface of the valve casing 10 is provided with a plurality of outer pressing rings 18, the outer pressing rings 18 are distributed in a circumferential array, the outer pressing rings 18 are arranged on the outer surface of the valve casing 10 through third studs 19, one end, extending out of the outer surface of the valve casing 10, of the third studs 19 is provided with a second nut 17, and the outer pressing rings 18 are pressed between the second nut 17 and the valve casing 10. The outer surface of the valve housing 10 is mounted with a second asbestos rubber plate 14, and the second asbestos rubber plate 14 can cover the outer surface of the second valve cover 13. The second double-headed stud 16 and the third stud 19 both pass through the second asbestos rubber plate 14, which is compressed between the inner pressure ring 15 and the second valve cap 13, and the third asbestos rubber plate is compressed between the outer pressure ring 18 and the valve housing 10.
The outer surface of the valve housing 10 is connected with a protecting cover 20, the protecting cover 20 surrounds the periphery of the second valve cover 13, and the first connecting seat, the second connecting seat, the inner pressing ring 15 and the outer pressing ring 18 are all positioned in the protecting cover 20, so that the second valve cover 13 is prevented from flying to the periphery. The inner surface of the valve casing 10 is connected with an asbestos rubber ring 21, one end of all third studs 19 penetrating through the inner surface of the valve casing 10 penetrates through an opening in the asbestos rubber ring 21, the third studs 19 are in interference connection with the opening in the asbestos rubber ring 21, and the asbestos rubber ring 21 plays a role in sealing.
The working principle of the embodiment is as follows:
Under normal vacuum conditions, the second asbestos rubber plate 14 is compressed against the outer surface of the second valve cover 13. When the vapor pressure in the exhaust cylinder rises to a certain value, the vapor pressure in the exhaust cylinder acts on the second valve cover 13, and the shearing force formed by the second valve cover 13 and the outer pressing ring 18 breaks the second asbestos rubber plate 14, so that the vapor is discharged to the atmosphere. The valve housing 10 and the second valve cover 13 are connected together through the connecting rod 12 and the pin 11, so that the second valve cover 13 can be prevented from flying out during the action of the atmosphere valve. In the embodiment, the second valve cover 13 is connected with the valve casing 10 by the connecting rod 12 and the pin shaft 11, after the second valve cover 13 is closed, under the connection effect of the connecting rod 12 and the pin shaft 11, the second valve cover 13 is also firm and stable during transportation and hydrostatic test, the second asbestos rubber plate 14 cannot be damaged, the temporary gasket 5 is not required to be additionally arranged, repeated installation and disassembly are not required, repeated procedures are reduced, and the construction period is shortened.
In this embodiment, the first connecting seat and one end of the connecting rod 12 may be detachably connected through other connection manners, and the second connecting seat and the other end of the connecting rod 12 may be detachably connected through other connection manners, such as a clamping connection.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The air valve of the exhaust cylinder of the steam turbine comprises a valve shell (10), wherein the valve shell (10) is provided with a valve port, a second valve cover (13) is arranged in the valve port, and the air valve is characterized in that a first connecting seat is arranged on the outer surface of the valve shell (10), a second connecting seat is arranged on the outer surface of the second valve cover (13), the first connecting seat is detachably connected with one end of a connecting rod (12), the second connecting seat is detachably connected with the other end of the connecting rod (12), a second asbestos rubber plate (14) is arranged on the outer surface of the valve shell (10), and the second asbestos rubber plate (14) can cover the outer surface of the second valve cover (13).
2. The atmospheric valve for the exhaust cylinder of the steam turbine according to claim 1, wherein a plurality of inner pressing rings (15) are arranged on the outer surface of the second valve cover (13), the inner pressing rings (15) are arranged on the second valve cover (13) through second studs (16), a second nut (17) is arranged at one end, extending out of the outer surface of the second valve cover (13), of the second studs (16), and the inner pressing rings (15) are pressed between the second nut (17) and the second valve cover (13);
The outer surface of the valve casing (10) is provided with a plurality of outer pressing rings (18), the outer pressing rings (18) are arranged on the outer surface of the valve casing (10) through third studs (19), one end of each third stud (19) extending out of the outer surface of the valve casing (10) is provided with a second nut (17), and the outer pressing rings (18) are tightly pressed between the second nuts (17) and the valve casing (10);
The second stud (16) and the third stud (19) both pass through the second asbestos rubber plate (14), the third asbestos rubber plate is pressed between the inner pressing ring (15) and the second valve cover (13), and the third asbestos rubber plate is pressed between the outer pressing ring (18) and the valve housing (10).
3. The exhaust cylinder air valve of a steam turbine according to claim 1, wherein the first connecting seat is connected with one end of the connecting rod (12) through a pin shaft (11), and the second connecting seat is connected with the other end of the connecting rod (12) through a pin shaft (11).
4. A steam turbine exhaust gas valve according to claim 1, wherein the first connecting seat is of a gradually increasing size in a direction towards the valve housing (10) and the second connecting seat is of a gradually increasing size in a direction towards the second valve cover (13).
5. A steam turbine exhaust gas valve according to claim 1, characterized in that the side wall of the second valve cover (13) abutting the valve port is tapered in a direction towards the inside of the valve housing (10).
6. A steam turbine exhaust gas valve according to claim 2, characterized in that the inner pressure rings (15) are arranged in a circumferential array.
7. A steam turbine exhaust gas valve according to claim 2, characterized in that the outer pressure rings (18) are arranged in a circumferential array.
8. A steam turbine exhaust cylinder air valve according to claim 7, characterized in that the inner surface of the valve housing (10) is connected with an asbestos rubber ring (21), all third studs (19) passing through openings in the asbestos rubber ring (21) at one end of the inner surface of the valve housing (10), the third studs (19) being in interference connection with the openings in the asbestos rubber ring (21).
9. A steam turbine exhaust gas valve according to claim 1, characterized in that the second connection seat is located in the centre of the second valve cover (13).
10. A steam turbine exhaust gas valve according to claim 1, characterized in that the outer surface of the valve housing (10) is connected with a protective cover (20), the protective cover (20) surrounding the second valve cover (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421072403.2U CN222616124U (en) | 2024-05-16 | 2024-05-16 | Air valve of exhaust cylinder of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421072403.2U CN222616124U (en) | 2024-05-16 | 2024-05-16 | Air valve of exhaust cylinder of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN222616124U true CN222616124U (en) | 2025-03-14 |
Family
ID=94882753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202421072403.2U Active CN222616124U (en) | 2024-05-16 | 2024-05-16 | Air valve of exhaust cylinder of steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN222616124U (en) |
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2024
- 2024-05-16 CN CN202421072403.2U patent/CN222616124U/en active Active
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