人防工程中的閘閥驗收標準主要包括以下幾個方面：

　　The acceptance criteria for gate valves in civil air defense engineering mainly include the following aspects:

　　一、閥門基本要求

　　1、 Basic requirements for valves

　　流體阻力：閘閥閥體通常為直通型，介質流動不改變方向，因此相比其他閥門流阻要小。

　　Fluid resistance: Gate valve bodies are usually straight through, and the flow of the medium does not change direction, so the flow resistance is smaller compared to other valves.

　　密封性能：閘閥的密封性能較截止閥要好，啟閉也較省力。

　　Sealing performance: Gate valves have better sealing performance than globe valves and require less effort to open and close.

　　適用范圍：閘閥具有廣泛的適用范圍，不僅可用于蒸汽、油品等介質，還適用于含有粒狀固體以及黏度較大的介質，同時也適用于放空閥和低真空系統的閥門。

　　Scope of application: Gate valves have a wide range of applications, not only for media such as steam and oil, but also for media containing granular solids and high viscosity. They are also suitable for valves in vent valves and low vacuum systems.

　　雙流向：閘閥不受介質流向限制，適用于介質可能改變流動方向的管路，同時也便于安裝。

　　Dual flow: Gate valves are not restricted by the flow direction of the medium and are suitable for pipelines where the flow direction of the medium may change. They are also easy to install.

　　二、閥門材質與結構要求

　　2、 Valve material and structural requirements

　　閥體材質：人防工程中的閘閥閥體應采用符合質量要求的材料制成，常見的材質包括銅芯或不銹鋼芯。

　　Valve body material: Gate valve bodies in civil air defense engineering should be made of materials that meet quality requirements, including copper or stainless steel cores.

　　法蘭要求：人防工程防護法蘭應采用不小于8mm厚的扁鋼法蘭，法蘭密封端應光滑、平整，無銹蝕、重皮、裂紋、空洞等缺陷。為了保證連接嚴密，法蘭密封端面應加工密封槽。

　　Flange requirements: The protective flange of civil air defense engineering should use a flat steel flange with a thickness of not less than 8mm. The sealing end of the flange should be smooth and flat, without defects such as rust, double skin, cracks, and voids. To ensure a tight connection, the flange sealing end face should be machined with a sealing groove.

　　連接方式：閘閥應采用焊接方式連接，不得使用抱箍連接件。同時，防護閥門應設三角支架以增加穩定性。

　　Connection method: Gate valves should be connected by welding and clamp connectors should not be used. At the same time, protective valves should be equipped with triangular brackets to increase stability.

　　三、閥門安裝與位置要求

　　3、 Valve installation and positioning requirements

　　安裝位置：閘閥應安裝在出墻20cm以內且不轉彎的位置，以確保閥門的操作和維護方便。

　　Installation position: The gate valve should be installed within 20cm of the wall without turning to ensure easy operation and maintenance of the valve.

　　安裝方向：對于具有特定安裝方向的閥門（如密閉閥門），應按照箭頭指示方向進行安裝。

　　Installation direction: For valves with specific installation directions (such as sealed valves), installation should be carried out in the direction indicated by the arrow.

　　穩固性：閥門安裝后應穩固可靠，不得出現松動或晃動現象。

　　Stability: After installation, the valve should be stable and reliable, without any looseness or shaking.

　　四、驗收流程與檢查要點

　　4、 Acceptance process and inspection points

　　檢查外觀：驗收時應首先檢查閘閥的外觀是否完好，包括閥體、法蘭、密封面等部位是否有損傷或缺陷。

　　Appearance inspection: During acceptance, the appearance of the gate valve should be checked first to ensure that it is intact, including whether there are any damages or defects in the valve body, flange, sealing surface, and other parts.

　　檢查密封性能：通過試驗檢查閘閥的密封性能是否符合要求，通常可采用壓力試驗或氣泡試驗等方法。

　　Check sealing performance: Check whether the sealing performance of the gate valve meets the requirements through testing, usually using methods such as pressure testing or bubble testing.

　　檢查操作靈活性：手動操作閘閥，檢查其啟閉是否靈活、輕便，無卡澀或異常聲響。

　　Check operational flexibility: Manually operate the gate valve and check whether its opening and closing are flexible, light, and free of jamming or abnormal noise.

　　檢查安裝質量：檢查閘閥的安裝位置、方向、穩固性等是否符合設計要求和相關標準。

　　Check installation quality: Check whether the installation position, direction, stability, etc. of the gate valve meet the design requirements and relevant standards.

　　記錄與文檔：驗收過程中應詳細記錄各項檢查結果，并整理成驗收報告，以便后續查閱和追溯。

　　Records and documentation: During the acceptance process, detailed records of all inspection results should be kept and compiled into an acceptance report for future reference and traceability.

　　綜上所述，人防工程中的閘閥驗收標準涵蓋了閥門的基本要求、材質與結構要求、安裝與位置要求以及驗收流程與檢查要點等多個方面。在驗收過程中，應嚴格按照相關標準和要求進行檢查和測試，確保閘閥的質量符合人防工程的使用要求。

　　In summary, the acceptance standards for gate valves in civil air defense engineering cover multiple aspects, including basic requirements for valves, material and structural requirements, installation and position requirements, as well as acceptance processes and inspection points. During the acceptance process, strict inspection and testing should be carried out in accordance with relevant standards and requirements to ensure that the quality of the gate valve meets the requirements for use in civil air defense engineering.

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