CN-122014362-A - Steam turbine valve

CN122014362ACN 122014362 ACN122014362 ACN 122014362ACN-122014362-A

Abstract

The invention provides a steam turbine valve, which comprises a valve seat, wherein extension pipelines are integrally formed at two ends of the valve seat, two ports of the extension pipelines are communicated with the steam turbine pipelines and fixedly connected with the steam turbine through flange pieces, a sealing gasket assembly is arranged between the steam turbine pipelines and the extension pipelines, a supporting seat is arranged below the extension pipelines, supporting legs are arranged at positions, corresponding to each flange piece, of the supporting seat, telescopic pieces are fixedly arranged on each supporting leg, clamping plates are fixedly connected at two ends of each telescopic piece, and two clamping plates corresponding to the same telescopic piece are respectively arranged at two sides of the adjacent flange piece. According to the invention, the telescopic parts are arranged on the two sides of the flange part, and the two clamping plates are used for clamping the two sides of the flange part, so that the connection tightness between the extension pipeline and the turbine pipeline is enhanced, and the sealing gasket assembly can maintain a stable sealing state for a long time under the continuous compression of the telescopic parts, thereby effectively improving the sealing property between the extension pipeline and the turbine pipeline in the earlier stage.

Inventors

Xu Jinhuai
LV YUANHAO
QIAO CHUANXI
YANG JIAXI
Lv Chunbiao
GUO YANHONG
MA LIN

Assignees

北方魏家峁煤电有限责任公司

Dates

Publication Date: 20260512
Application Date: 20260213

Claims (9)

1. The steam turbine valve is characterized by comprising a valve seat, wherein extension pipelines are integrally formed at two ends of the valve seat, two ports of the extension pipelines are communicated with a steam turbine pipeline, and the extension pipelines are fixedly connected with the steam turbine through flange pieces; a sealing gasket assembly is arranged between the turbine pipeline and the extension pipeline; The extension pipeline below is provided with the supporting seat, the supporting seat corresponds every flange spare position department and all is provided with the supporting leg, every fixedly on the supporting leg be provided with the extensible member, extensible member both ends fixedly connected with grip block, same two that the extensible member corresponds the grip block sets up respectively in the both sides of flange spare that are close to.
2. A steam turbine valve as claimed in claim 1, wherein the telescopic member is provided as a hydraulic cylinder.
3. The steam turbine valve of claim 1, wherein the sealing gasket assembly includes a first gasket disposed on the end face of the extension duct and a second gasket disposed on the end face of the steam turbine duct, the first gasket being abuttable with the second gasket.
4. A steam turbine valve as claimed in claim 3 wherein the first and second gaskets are each provided as flexible graphite gaskets.
5. A steam turbine valve as claimed in claim 1, wherein the clamping plate is provided with a heat insulating pad on the side facing the flange member.
6. A steam turbine valve as claimed in claim 3, wherein the peripheral side of the end of the extension pipe is provided with an annular step, and the first gasket is sleeved outside the annular step; The annular step can be inserted into the turbine pipeline.
7. The steam turbine valve of claim 6, wherein the steam turbine pipe port is provided with an annular chamfer in cooperation with the annular step, and the second gasket is fixedly disposed within the annular chamfer.
8. A steam turbine valve as claimed in claim 1, wherein the flange members are provided with fixing bolts uniformly along the peripheral sides of the extension pipes.
9. A steam turbine valve as claimed in claim 1 wherein the valve seat is provided with a triple eccentric butterfly valve element.

Description

Steam turbine valve Technical Field The invention relates to the technical field of steam turbine equipment, in particular to a steam turbine valve. Background The turbine valve is a core component for controlling steam flow in a turbine system, and directly influences the power regulation, safe operation and efficiency of the unit. The patent publication No. CN117628192A proposes a steam turbine valve for a thermal power plant, which mainly comprises a valve sleeve, a valve core, an inlet and outlet assembly, a separation assembly, a lifting assembly, a fixing assembly, a feedback assembly, a cooling assembly, a drainage assembly and a sealing assembly, wherein the sealing assembly comprises a flange and a spacer, the flange is used for pressing a clamping ring on a pipeline or a steam turbine when being fastened through bolts, the clamping ring moves towards the inner side of the clamping ring along with the fastening operation of the bolts, the air in the clamping ring is compressed until the sealing ring is clamped between the flange and the pipeline or the steam turbine, the inner side of the flange is insulated through the spacer, the multi-layer sleeve is used for sealing by the clamping ring and the clamping ring, the sealing effect is improved, the multi-layer sleeve is used for insulating heat, the heat of the high-temperature high-pressure steam in the pipeline is prevented from being conducted to the sealing ring, the aging of the sealing ring is prevented, the poor sealing property is prevented from being caused by the damage of the sealing ring, and the sealing property and the heat insulation property of the joint of the valve and the pipeline and the steam turbine is guaranteed. But in the in-service use process, heat in the pipeline is diffused to the whole valve and the pipeline, the sealing ring is still in contact with the pipeline, and the sealing ring is in a high-temperature environment for a long time, so that ageing of the sealing ring can be accelerated, and the tightness of the joint of the pipeline and the valve is affected. Disclosure of Invention The present invention aims to solve at least one of the technical problems in the related art to some extent. In order to achieve the purpose, the invention provides a steam turbine valve, which comprises a valve seat, wherein extension pipelines are integrally formed at two ends of the valve seat, two ports of the extension pipelines are communicated with a steam turbine pipeline, and the extension pipelines are fixedly connected with the steam turbine through flange pieces; a sealing gasket assembly is arranged between the turbine pipeline and the extension pipeline; The extension pipeline below is provided with the supporting seat, the supporting seat corresponds every flange spare position department and all is provided with the supporting leg, every fixedly on the supporting leg be provided with the extensible member, extensible member both ends fixedly connected with grip block, same two that the extensible member corresponds the grip block sets up respectively in the both sides of flange spare that are close to. According to the invention, the telescopic parts are arranged on the two sides of the flange part, and the two clamping plates are used for clamping the two sides of the flange part, so that the connection tightness between the extension pipeline and the turbine pipeline is enhanced, and the sealing gasket assembly can maintain a stable sealing state for a long time under the continuous compression of the telescopic parts, thereby effectively improving the sealing property between the extension pipeline and the turbine pipeline in the earlier stage. Optionally, the telescopic member is provided as a hydraulic cylinder. Further, the sealing gasket assembly comprises a first gasket and a second gasket, wherein the first gasket is arranged on the end face of the extension pipeline, the second gasket is arranged on the end face of the turbine pipeline, and the first gasket and the second gasket can be in butt joint. Further, the first gasket and the second gasket are each provided as a flexible graphite gasket. Further, a heat insulation pad is arranged on one side, facing the flange piece, of the clamping plate. Further, an annular step is arranged on the peripheral side of the end part of the extension pipeline, and the first gasket is sleeved outside the annular step; The annular step can be inserted into the turbine pipeline. Further, the turbine pipeline port is provided with an annular chamfer in cooperation with the annular step, and the second gasket is fixedly arranged in the annular chamfer. Further, fixing bolts are uniformly arranged on the flange piece along the peripheral side of the extension pipeline. Further, a valve core of the three-eccentric butterfly valve is arranged on the valve seat. Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in p