標準編號:	GB/T 14478-2025
中文名稱:	大中型水輪機進水閥門基本技術規范
英文名稱:	Basic technical specification of inlet valves for large and medium-sized hydraulic turbines
行業分類:	GB    國家標準
發布機構:	國家市場監督管理總局 國家標準化管理委員會
發布日期:	2025-02-28
實施日期:	2025-9-1
標準狀態:	to be valid
替代舊標準:	GB/T 14478-2012 大中型水輪機進水閥門基本技術條件 GB/T 14478-2012 大中型水輪機進水閥門基本技術條件
翻譯語言:	英文
文件格式:	PDF
中文字符數:	21000 字
翻譯價格(元):	1470.0
交付時間:	付款后 1~5 個工作日

GB/T 14478-2025 Basic technical specification of inlet valves for large and medium-sized hydraulic turbines 1 Scope This document specifies the basic technical requirements and model compilation methods of inlet valves for large and medium-sized hydraulic turbines, and describes the test methods. This document is applicable to the design, manufacture and acceptance of the butterfly valves with nominal diameter of 1000mm to 10000mm and the ball valves with nominal diameter of 500mm to 5000mm. Other butterfly and ball valves (including storage pumps, water pumps and pump turbines) shall be executed by made reference to this document. 2 Normative references The following documents contain requirements which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. GB/T 150 (all parts) Pressure vessels GB/T 191 Packaging - Pictorial marking for handling of goods GB/T 2900.45 Electrotechnical terminology - Hydroelectric powerplant machinery GB/T 8564 Specification installation of hydraulic turbine generator units GB/T 9652.1 Specification of hydraulic turbine governing systems GB/T 9652.2 Testing specification of hydraulic turbine governing systems GB/T 15468-2020 Fundamental technical requirements for hydraulic turbines GB/T 22581-2008 Fundamental technical requirements for francis pump-turbine GB/T 28546 Specification for package, transportation and storage of large and medium hydraulic units GB/T 40582 Basic terminology of hydropower station DL/T 1066 Guide of maintenance management for hydropower station equipments 3 Terms and definitions For the purposes of this document, the terms and definitions given in GB/T 2900.45 and GB/T 40582 and the following apply. 3.1 nominal diameter of inlet valve D minimum inner diameter of valve body throughflow at the connection of inlet valves and upstream/downstream pressure diversion pipe flanges Note: In millimeters (mm). In case of different inner diameters on both sides, the smaller one shall prevail. 3.2 maximum static head Hst height of water column formed from horizontal center line of inlet valve to the upstream normal storage level after the inlet valve is closed Note: In meters (m). 3.3 maximum static pressure pc water pressure formed from horizontal center line of inlet valve to the upstream normal storage level after the inlet valve is closed Note: In megapascals (MPa). 3.4 maximum momentary pressure pmmax maximum gauge pressure generated at the horizontal center line of inlet valve in transient process Note: In megapascals (MPa). 3.5 design pressure pd pressure used in the strength design of overflow parts of turbine inlet valves Note: In megapascals (MPa). 3.6 test pressure pt pressure of pressure-containing components used for turbine inlet valves and piping systems in factory or field tests Note: In megapascals (MPa). 3.7 extention section section of the upstream side of inlet valve connected with the upstream pressure inlet pipe 3.8 expansion joint section with expansion function connecting the downstream side of inlet valve to the downstream pressure inlet pipe (such as a volute or distribution ring pipe) 3.9 assembly of inlet valve assembly consisting of valve body, valve, shaft, boom and seal components 3.10 hydraulic power self-excited oscillation oscillation, that intensifies over time, caused by any small perturbation of pressure or flow that introduces an unstable hydraulic system, 4 Basic technical requirements 4.1 The design pressure of inlet valves shall not less than the highest transient pressure. The design, manufacture and inspection of the pressure-containing components of inlet valve and piping system shall meet the requirements of GB/T 150 (all parts), GB/T 15468-2020, 4.2.1.21 and GB/T 22581-2008, 4.2.1.21. 4.2 During normal shutdown or overhaul of units, inlet valves shall be able to be closed reliably. 4.3 Under any operating condition of units, the inlet valve shall be able to be closed under hydrodynamic conditions, without harmful oscillation that leads to permanent deformation. 4.4 Operating state of the inlet valve gate shall be at full-on or fully closed position, not for flow regulation. 4.5 The profile design of butterfly valve shall avoid the oscillation caused by Karman vortex. 4.6 Where the pressure difference on both sides is not greater than the maximum static pressure, the inlet valve shall be able to be normally opened or closed. 4.7 The inlet valve body shall be assembled in the factory. After the final assembly and the installation at power station, the operation shall be flexible, and the position of full opening and full closing shall be accurate. When the inlet valve has no final assembly conditions in the factory, the relay is not involved in the assembly, but the relay shall be separately tested for seal leakage, action and stroke inspection. The opening and closing time of inlet valves shall be adjustable.

Contents Foreword 1 Scope 2 Normative references 3 Terms and definitions 4 Basic technical requirements 5 Model compilation method of inlet valves 6 Test methods 7 Installation and operation 8 Supply scope of complete set 9 Acceptance and guarantee 10 Nameplate, packaging, transportation and storage Annex A (Informative) Names of some structural parts of bimetal sealed inlet ball valve Annex B (Normative) Model compilation method of inlet valves Annex C (Informative) Spare parts of inlet valve

大中型水輪機進水閥門基本技術規范 1 范圍 本文件規定了大中型水輪機進水閥門的基本技術要求和型號編制方法,描述了試驗方法。 本文件適用于水輪機進水閥門公稱直徑1000mm~10000mm蝶閥和公稱直徑500mm~5000mm球閥的設計、制造與驗收。 其他(包括蓄能泵、調水泵和水泵水輪機)的蝶閥、球閥參照本文件執行。 2 規范性引用文件 下列文件中的內容通過文中的規范性引用而構成本文件必不可少的條款。其中，注日期的引用文件，僅該日期對應的版本適用于本文件；不注日期的引用文件，其最新版本(包括所有的修改單)適用于本文件。 GB/T 150(所有部分) 壓力容器 GB/T 191 包裝儲運圖示標志 GB/T 2900.45 電工術語 水電站水力機械設備 GB/T 8564 水輪發電機組安裝技術規范 GB/T 9652.1 水輪機調速系統技術條件 GB/T 9652.2 水輪機調速系統試驗 GB/T 15468-2020 水輪機基本技術條件 GB/T 22581-2008 混流式水泵水輪機基本技術條件 GB/T 28546 大中型水電機組包裝、運輸和保管規范 GB/T 40582 水電站基本術語 DL/T 1066 水電站設備檢修管理導則 3 術語和定義 GB/T 2900.45和GB/T 40582界定的以及下列術語和定義適用于本文件。 3.1 進水閥門公稱直徑 nominal diameter of inlet valve D 進水閥門與上、下游壓力引水管法蘭相聯處閥體的通流最小內徑。 注：單位為毫米(mm)，若兩側內徑不相同，則取小值。 3.2 最大靜水頭 maximum static head Hst 進水閥門關閉后，進水閥門水平中心線至上游正常蓄水位所形成的水柱高。 注：單位為米(m)。 3.3 最大靜水壓 maximum static pressure pc 進水閥門關閉后，進水閥門水平中心線至上游正常蓄水位所形成的水壓。 注：單位為兆帕(MPa)。 3.4 最高瞬態壓力 maximum momentary pressure pmmax 過渡過程中，在進水閥門水平中心線處所產生的最高表計壓力。 注：單位為兆帕(MPa)。 3.5 設計壓力 design pressure pd 用于水輪機進水閥門過流部件強度設計的壓力。 注：單位為兆帕(MPa)。 3.6 試驗壓力 test pressure pt 用于水輪機進水閥門及管路系統的承壓部件在工廠或工地現場試驗時的壓力。 注：單位為兆帕(MPa)。 3.7 延伸段 extention section 進水閥門上游側與上游壓力引水管聯接的管段。 3.8 伸縮節 expansion joint 進水閥門下游側與下游壓力引水管(如蝸殼或配水環管)聯接的帶伸縮功能管段。 3.9 進水閥門本體 assembly of inlet valve 由閥體、活門、閥軸、轉臂和密封等部件組成的裝配。 3.10 水力自激振動 hydraulic power self-excited oscillation 任何引入不穩定水力系統的壓力或流量的微小擾動都將導致隨時間而不斷增強的振動。 4 基本技術要求 4.1 進水閥的設計壓力不小于最高瞬態壓力;進水閥門及管路系統承壓部件的設計、制造、檢驗應符合GB/T 150(所有部分)、GB/T 15468—2020中4.2.1.21、GB/T 22581—2008中4.2.1.21規定。 4.2 機組正常停機或檢修時，進水閥門應可靠關閉。 4.3 機組在任何運行工況下，進水閥門應動水關閉且不產生導致永久變形的有害振動。 4.4 進水閥門活門工作狀態應處于全開或全關位置，不作調節流量用。 4.5 蝶閥活門的型線設計應避免卡門渦引起的振動。 4.6 在進水閥門兩側壓差不大于30%最大靜水壓時，應正常開啟。 4.7 進水閥門本體在制造廠應進行總裝?？傃b及電站安裝后，應保證動作靈活，全開、全關位置準確。進水閥門在制造廠無總裝條件時，接力器不參與裝配，但接力器應單獨進行密封滲漏、動作和行程檢查等試驗。進水閥門開啟、關閉時間應可調。