Wall through conduit, an essential component in both construction and electrical domains, is also known as wall through pipe, waterproof conduit, or wall embedded pipe. This versatile hardware fitting or insulation support component is crucial for pipelines traversing through walls. Its widespread application spans across construction and electricity sectors. Below, we delve into the nuanced classification, intricate structure, diverse purposes, and key selection criteria:
Classification and Characteristics: A Comprehensive Overview
• Classified by Waterproofing Efficacy and Usage Scenarios
Rigid waterproof sleeve: Engineered with a robust thick-walled steel pipe and wing ring, or circular steel plate fitted snugly on the steel pipe, this sleeve boasts unparalleled strength and rigidity. It stands resilient against high pressure and tension, ensuring pipelines remain protected without succumbing to deformation or breakage. The innovative material and structural design confer superior waterproof capabilities, effectively isolating moisture and resisting rainwater erosion. Its formidable corrosion resistance makes it impervious to harsh environmental conditions and chemical erosion. Ideal for applications like basements where waterproofing is paramount and pipelines are not subject to vibration or expansion deformation, it serves as a guardian against groundwater infiltration in building basements.
Flexible waterproof conduit: Crafted with external wing rings and internal components such as retaining rings and flange threads, it is tailored for scenarios where pipelines experience vibration or demand stringent waterproofing. Perfect for civil defense walls, water tanks, and water pump rooms, this conduit ensures no water leakage while adeptly adapting to vibrations encountered during equipment operation, as seen in sewage treatment plant water tanks.
• Classified by Material Composition and Intended Purpose
Ceramic insulated AC wall bushing (porcelain bushing): Constructed from premium ceramic parts, reinforced with mounting flanges and conductors, this type is predominantly used in the power sector. It provides essential insulation and support for conductive parts that must pass through walls or other grounding elements, ensuring seamless functionality.
Dry type capacitive AC wall bushing (silicone rubber bushing): This innovative bushing is oil-free, gas-free, and devoid of porcelain, rendering it compact and lightweight with minimal maintenance requirements. Its exceptional fire-resistant and explosion-proof attributes, paired with high-precision through-type current transformers, ensure uniform voltage distribution. Utilizing silicone rubber material for external insulation, it significantly enhances the pollution flashover voltage, elevating its performance and reliability.
Structure: A Detailed Insight
Generally assembled from ceramic parts, mounting flanges, and conductors (in the case of conductive through wall sleeves), the design of busbar through wall conduits excludes conductive parts. While some products employ mechanical clamping, porcelain sleeves and flanges are typically secured using cement adhesive. Copper conductors are meticulously fixed with centering washers and nuts, while copper and aluminum variants employ centering washers and open pins for stability. To mitigate initial corona and ensure uniform voltage distribution, certain bushing structures (20, 35kV) adopt measures like thickening the porcelain wall and umbrella near the flange or applying semiconductor glaze on specific porcelain sections, enhancing the electric field distribution.
Purpose: Essential Applications
In architectural fields, these conduits play a pivotal role in safeguarding pipelines that traverse walls, fulfilling crucial waterproofing and vibration mitigation requirements. Their application ensures the structural integrity of buildings and the optimal functioning of pipeline systems, making them indispensable in plumbing, fire protection, ventilation, and various pipeline engineering projects.
In the electrical domain, these conduits are vital in power plants, substations, distribution equipment, and high-voltage electrical appliances, facilitating the passage of conductive parts through walls or other grounding elements. They provide insulation and sturdy support, guaranteeing the safe and stable transmission of power, thus bolstering the reliability of electrical systems.
Key Selection Points: Making the Right Choice
• Type and Pattern: Select the indoor or outdoor type based on the installation location. For the intended purpose, choose between wall conduit with conductor or opt for the busbar type wall conduit without conductor, ensuring the perfect fit for your specific needs.
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