Steam turbine valve

Abstract

The steam turbine valve comprises a valve seat, extending pipelines are integrally formed at the two ends of the valve seat, two ports of the extending pipelines communicate with steam turbine pipelines, and the extending pipelines are fixedly connected with a steam turbine through flange pieces; a sealing washer assembly is arranged between the steam turbine pipeline and the extension pipeline; a supporting base is arranged below the extending pipeline, supporting legs are arranged at the positions, corresponding to the flange pieces, of the supporting base, a telescopic piece is fixedly arranged on each supporting leg, the two ends of each telescopic piece are fixedly connected with clamping plates, and the two clamping plates corresponding to the same telescopic piece are arranged on the two sides of the adjacent flange piece respectively. The telescopic pieces are arranged on the two sides of the flange piece, the two sides of the flange piece are clamped through the two clamping plates, the connection tightness between the extension pipeline and the steam turbine pipeline is enhanced, and under continuous pressurization of the telescopic pieces, the sealing gasket assembly can maintain the stable sealing state for a long time; and therefore, the sealing performance between the extension pipeline and the early-stage turbine pipeline is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of steam turbine equipment technology, and in particular to a steam turbine valve. Background Technology

[0002] Steam turbine valves are core components in steam turbine systems that control steam flow, directly affecting the unit's power regulation, safe operation, and efficiency.

[0003] Patent publication number CN117628192A discloses a steam turbine valve for thermal power plants, which mainly includes: a valve sleeve and valve core, an inlet / outlet assembly, a partition assembly, a lifting assembly, a fixing assembly, a feedback assembly, a cooling assembly, a drainage assembly, and a sealing assembly. The sealing assembly includes a flange and a gasket. When the flange is tightened with bolts, a retaining ring is pressed against the pipeline or steam turbine. As the bolts are tightened, the retaining ring moves inward towards the inner side of the retaining ring, compressing the air inside the retaining ring until the sealing ring is clamped between the flange and the pipeline or steam turbine. The inner side of the flange is insulated by the gasket. At the same time, the multi-layered retaining ring and retaining ring are used for sealing, improving the sealing effect. The multi-layered retaining ring and retaining ring also provide heat insulation, preventing the heat and pressure of the high-temperature and high-pressure steam in the pipeline from being conducted to the sealing ring, thereby preventing the sealing ring from aging and preventing poor sealing due to sealing ring damage. This ensures the sealing and heat insulation of the connection between the valve and the pipeline and steam turbine.

[0004] However, in actual use, the heat inside the pipeline diffuses to the entire valve and pipeline, and the sealing ring is still in contact with the pipeline. The sealing ring is in a high-temperature environment for a long time, which will accelerate the aging of the sealing ring and affect the sealing performance of the connection between the pipeline and the valve. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the technical problems in the related art.

[0006] To achieve the above objectives, the present invention proposes a steam turbine valve, including a valve seat, wherein both ends of the valve seat are integrally formed with an extension pipe, both ends of the extension pipe are connected to a steam turbine pipe, and the extension pipe is fixedly connected to the steam turbine by a flange.

[0007] A sealing gasket assembly is provided between the turbine pipeline and the extension pipeline; A support base is provided below the extension pipe. Each support base has a support leg at the position of each flange. A telescopic component is fixedly provided on each support leg. Clamping plates are fixedly connected to both ends of the telescopic component. The two clamping plates corresponding to the same telescopic component are respectively provided on both sides of the adjacent flange.

[0008] This invention enhances the tightness of the connection between the extension pipe and the turbine pipe by setting telescopic components on both sides of the flange and clamping the flange with two clamping plates. Under the continuous pressure of the telescopic components, the sealing gasket assembly can maintain a stable sealing state for a long time, thereby effectively improving the sealing performance between the extension pipe and the turbine pipe.

[0009] Optionally, the telescopic component is configured as a hydraulic cylinder.

[0010] Furthermore, the sealing gasket assembly includes a first gasket and a second gasket, the first gasket being disposed on the end face of the extended pipe, and the second gasket being disposed on the end face of the turbine pipe, wherein the first gasket and the second gasket are abutting each other.

[0011] Furthermore, both the first washer and the second washer are configured as flexible graphite washers.

[0012] Furthermore, a heat insulation pad is provided on the side of the clamping plate facing the flange.

[0013] Furthermore, an annular step is provided on the periphery of the end of the extended pipe, and the first washer is sleeved on the outside of the annular step; The annular step can be inserted into the turbine pipeline.

[0014] Furthermore, the turbine pipe port is provided with an annular chamfer in conjunction with the annular step, and the second washer is fixedly disposed within the annular chamfer.

[0015] Furthermore, fixing bolts are evenly arranged on the flange along the periphery of the extended pipe.

[0016] Furthermore, the valve seat is provided with a triple eccentric disc valve core.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, wherein: Figure 1 This is an isometric structural schematic diagram of a steam turbine valve according to the present invention; Figure 2 This is a schematic diagram of the main structure of a steam turbine valve according to the present invention; Figure 3 This is a side view structural schematic diagram of a steam turbine valve according to the present invention; Figure 4This is a top view schematic diagram of a steam turbine valve according to the present invention; Figure 5 yes Figure 2 Enlarged structural diagram at point A in the middle.

[0019] Explanation of reference numerals in the attached figures: 1. Valve seat; 11. Triple eccentric butterfly valve core; 2. Extension pipe; 21. First washer; 3. Steam turbine pipe; 31. Second washer; 4. Fixing bolt; 5. Support seat; 51. Telescopic component; 52. Clamping plate. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] This invention proposes a steam turbine valve, as described below. Figures 1 to 5 Please provide a detailed explanation.

[0022] A steam turbine valve includes a valve seat 1, on which a triple eccentric disc valve core is provided. An extension pipe 2 is integrally formed at both ends of the valve seat 1. Both ends of the extension pipe 2 are connected to a steam turbine pipe 3, and the extension pipe 2 is fixedly connected to the steam turbine through a flange. A sealing gasket assembly is installed between the turbine pipe 3 and the extension pipe 2; A support base 5 is provided below the extension pipe 2. A support leg is provided at each flange position of the support base 5. A telescopic component 51 is fixedly provided at the top of each support leg. Clamping plates 52 are fixedly connected to both ends of the telescopic component 51. The two clamping plates 52 corresponding to the same telescopic component 51 are respectively provided on both sides of the adjacent flange.

[0023] Specifically, when connecting the turbine pipeline 3 and the extension pipeline 2, the turbine pipeline 3 and the extension pipeline 2 are first fixedly connected by flanges. Then, the telescopic component 51 is controlled to drive the two clamping plates 52 to move. The two clamping plates 52 clamp the flanges on both sides, enhancing the tightness of the connection between the extension pipeline 2 and the turbine pipeline 3. Under the continuous pressure of the telescopic component 51, the sealing gasket assembly can maintain a stable sealing state for a long time, thereby effectively improving the sealing performance between the extension pipeline 2 and the turbine pipeline.

[0024] Optionally, the telescopic component 51 is configured as a hydraulic cylinder. Because the hydraulic cylinder provides stable pressure, it can maintain the two clamping plates 52 in a clamping state for an extended period, thereby ensuring a long-term tight connection between the extension pipe 2 and the turbine pipe 3.

[0025] In some embodiments, the sealing gasket assembly includes a first gasket 21 and a second gasket 31. The first gasket 21 is disposed on the end face of the extension pipe 2, and the second gasket 31 is disposed on the end face of the turbine pipe 3. The first gasket 21 and the second gasket 31 are abutting each other. The first gasket 21 and the second gasket 31 can cooperate with each other. When the extension pipe 2 and the turbine pipe 3 are connected, the first gasket 21 and the second gasket 31 are squeezed and deformed against each other, thereby filling the connection gap and enhancing the sealing performance between the turbine pipe 3 and the extension pipe 2.

[0026] In some embodiments, both the first gasket 21 and the second gasket 31 are flexible graphite gaskets. Flexible graphite gaskets are annular seals molded from graphite tape or braided packing, suitable for media such as hot water, high-temperature and high-pressure steam, organic solvents, and cryogenic liquids. Their technical parameters are pressure ≤35MPa and temperature -200~850℃ (up to 2800℃ in non-oxidizing environments). Flexible graphite gaskets are suitable for the high-temperature conditions of turbine pipelines 3. Furthermore, the flexible contact between the first gasket 21 and the second gasket 31 further enhances the sealing performance.

[0027] In some embodiments, a heat insulation pad is provided on the side of the clamping plate 52 facing the flange. Due to the high temperature characteristics of the turbine pipeline 3, high temperature can be transferred to the clamping plate 52 through the flange, and the heat insulation pad can isolate heat transfer, thereby protecting the clamping plate 52.

[0028] In some embodiments, an annular step is provided on the periphery of the end of the extension pipe 2, and a first washer 21 is fitted on the outside of the annular step; the annular step can be inserted into the turbine pipe 3. Furthermore, an annular chamfer is provided at the end of the turbine pipe 3 in conjunction with the annular step, and a second washer 31 is fixedly installed inside the annular chamfer.

[0029] The annular step can change the connection method between the extension pipe 2 and the turbine pipe 3. Compared with the traditional method of connecting the two ends of the extension pipe 2 and the turbine pipe 3 only through flanges, the annular step can be inserted into the turbine pipe 3, which means that the end of the extension pipe 2 can be inserted into the turbine pipe 3. This extends the connection surface between the turbine and the extension pipe 2, allowing the sealing gasket assembly to seal more connection surfaces and further increase the sealing performance between the extension pipe 2 and the steam pipe.

[0030] In some embodiments, fixing bolts 4 are evenly arranged on the flange along the periphery of the extended pipe 2. The fixing bolts 4 can ensure a stable connection of the flange.

[0031] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0032] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0035] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0036] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A steam turbine valve, characterized in that, The valve includes a valve seat, both ends of which are integrally formed with extension pipes. Both ends of the extension pipes are connected to turbine pipes, and the extension pipes are fixedly connected to the turbine via flanges. A sealing gasket assembly is provided between the turbine pipeline and the extension pipeline; A support base is provided below the extension pipe. Each support base has a support leg at the position of each flange. A telescopic component is fixedly provided on each support leg. Clamping plates are fixedly connected to both ends of the telescopic component. The two clamping plates corresponding to the same telescopic component are respectively provided on both sides of the adjacent flange.

2. A turbine valve as described in claim 1, characterized in that, The telescopic component is configured as a hydraulic cylinder.

3. A turbine valve as described in claim 1, characterized in that, The sealing gasket assembly includes a first gasket and a second gasket. The first gasket is disposed on the end face of the extension pipe, and the second gasket is disposed on the end face of the turbine pipe. The first gasket and the second gasket are abutting each other.

4. A steam turbine valve as described in claim 3, characterized in that, Both the first washer and the second washer are made of flexible graphite.

5. A turbine valve as described in claim 1, characterized in that, A heat insulation pad is provided on the side of the clamping plate facing the flange.

6. A turbine valve as described in claim 3, characterized in that, An annular step is provided on the periphery of the end of the extension pipe, and the first washer is sleeved on the outside of the annular step. The annular step can be inserted into the turbine pipeline.

7. A turbine valve as described in claim 6, characterized in that, The turbine pipe port is provided with an annular chamfer in conjunction with the annular step, and the second washer is fixedly installed inside the annular chamfer.

8. A turbine valve as described in claim 1, characterized in that, The flange is provided with fixing bolts evenly distributed along the periphery of the extended pipe.

9. A steam turbine valve as described in claim 1, characterized in that, The valve seat is equipped with a triple eccentric disc valve core.

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