CP VC電力管ケーブル保護施工方案:高温環境と密封処理

2025-08-18


CPVC高温環境でケーブルを保護するための重要な材料として、その建設品質は電力システムの安全で安定した動作に直接関係しています。この論文では、エンジニアリングの実践と組み合わせて、高温環境でのCP VC電力管の主要な建設技術を、材料の前処理、設置プロセス、およびシーリング保護の3つの側面から説明します。

1。高温環境での建設技術の要点

1。材料の前処理プロセス

CPVCパイプは、入力する前に高温性能テストを実行する必要があります。Vicaの軟化温度が93°C、引張強度が60 MPaであることを確認してください。夏の建設では、パイプは直射日光によるパイプ本体の温度が40°Cを超えないように、涼しく換気の良い場所に保管する必要があります。切断作業は、周囲温度が35°C未満のときに実行する必要があります。切り口は、傾斜角度305トレンチ掘削と地下処理

高温環境でのトレンチ掘削は、セグメント化された工法を採用する必要があります。各セグメントの長さは50メートル以内に制御され、掘削深さが2メートルを超えると、斜面支持が設定されます。ベース処理は、93%の層状圧縮度を備えた段階的な砂と石の埋め戻しを採用し、厚さ200 mmの中粗砂クッション層を敷設し、プレートバイブレーターを使用して振動させて密度を高め、表面平坦度誤差5 mm/2 m。

3。パイプライン敷設プロセス

敷設前に、パイプを予熱し、パイプ本体の温度を25〜30°Cに制御する必要があります。機械的な牽引法で設置する場合、牽引力は15 kNであり、牽引速度は0.8 m/minパイプラインインターフェースに弾性緩衝層を設置し、ブチルゴムガスケットでシールし、インターフェースギャップを1.5-2.0 mm、軸偏差を10 mm/10 mに制御します。

第二に、シール処理のための特別な計画

1。プラグインインターフェースシールプロセス

は、「ダブルシールリング+弾性シーラント」複合シール構造を採用しています。最初のシールリングはエチレンプロピレンゴム材料でできており、ショア硬度は705 HAで、圧縮量は35%〜40%に制御されています。2番目のシールリングは水にさらされると膨張するゴムでできており、膨張率は300%です。インターフェースの内側は高温シーラントで均一にコーティングされており、接着剤層の厚さは1.2-1.5 mm、表面乾燥時間は30分です。

2。坑井接続シール処理

ケーブル作業井とパイプの接続部に柔軟な防水ケーシングを設置し、ケーシングとパイプの隙間にポリウレタン発泡充填を採用し、密度は60 kg/m³です。井戸壁の外側には、厚さ2 mmのポリ尿素防水層が塗られており、伸び率は300%、接着力は5 MPaです。坑口は鋳鉄製のマンホールカバーでシールされており、ニトリルゴム製の止水リングが内蔵されており、圧縮量は25%〜3%に制御されています。

3。特殊部品シール対策

交差道路セクションはMPP強化保護チューブカバーを採用しており、ケーシングとCP VCチューブの間には、密度120 kg/m³の耐火ロックウールが充填されています。両端は耐火シーリング高低差のある場所に防水ショルダーテーブルを設置し、C 25コンクリートを流し込み、傾斜を5〜8に制御し、表面に浸透性結晶防水塗料を塗布し、ドライフィルムの厚さを1.0 mmにします。

3.品質管理と安全対策

建設中は、200メートルごとに品質管理ポイントを設置する必要があります。テスト項目には、パイプラインの標高偏差10 mm、軸方向の変位30 mm/100 m、インターフェースシールテスト圧力0.6 MPa、圧力降下なしで30分間保持します。高温運転期間中は11: 00〜15:00を避け、建設現場に強制換気装置を設置し、周囲温度が38°Cを超えると屋外作業を停止します。

本方案は材料科学選定、微細化施工技術と多重密封防護システムを通じて、高温環境下でCP VC電力管の施工難題を効果的に解決することができ、工事検証を経て、この方案を採用して施工したケーブル保護システムは、80℃環境下で50年間漏れがないことを保証でき、絶縁抵抗1000 MΩ・kmは、電力工事の極端な環境下での安全運行に信頼できる保障を提供する。施工全過程は「電力工事ケーブル線路設計規範」GB 50217及び「埋設ポリエチレン排水管配管工事技術規程」CJJ 143関連基準を厳格に実行しなければならない。

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