Wall through conduit, also known as wall through pipe, waterproof conduit, or wall embedded pipe, is an essential hardware fitting or insulation support component crucial for pipelines traversing walls. These conduits find extensive applications in industries such as construction and electricity. Let's delve into their classification, intricate structures, diverse purposes, and key selection pointers:
Classification and Characteristics
• Categorized by waterproofing capabilities and specific usage scenarios
Rigid waterproof sleeve: This robust component is crafted from thick-walled steel pipe accompanied by a wing ring (a circular steel plate attached to the pipe). It boasts high strength and rigidity, capable of withstanding considerable pressure and tension, making it resistant to deformation or breakage. It effectively safeguards pipelines through advanced material and structural design, providing exceptional waterproof performance and shielding against moisture and rainwater intrusion. The sleeve also exhibits remarkable corrosion resistance, standing strong against harsh environments and chemical exposure. Ideally suited for environments like basements where waterproofing is paramount and where pipelines are not subject to vibration or expansion-induced deformation, it ensures groundwater does not seep into building interiors.
Flexible waterproof conduit: Featuring wing rings on the exterior and internal components like retaining rings and flange threads, this conduit is designed for structures where pipelines penetrate walls and must endure vibration or require stringent waterproofing. Applications include civil defense walls, water tanks, and pump rooms. In sewage treatment facilities, pipelines penetrating water tank walls must not only prevent leaks but also accommodate vibrations during equipment operations.
• Classified by material composition and intended purpose
Ceramic insulated AC wall bushing (porcelain bushing): This component integrates ceramic parts with mounting flanges and conductors. Predominantly used in the power sector, it serves dual functions of insulation and support for conductive elements passing through walls or other grounded structures.
Dry type capacitive AC wall bushing (silicone rubber bushing): This innovative, oil-free, gas-free, and porcelain-free bushing is compact, lightweight, and low-maintenance. Fire-resistant and explosion-proof, it incorporates high-precision through-type current transformers. With uniform voltage distribution along its surface and external insulation made from silicone rubber, it significantly enhances flashover voltage resistance against pollution.
Structure
Typically composed of ceramic components, mounting flanges, and conductors (for conductive through-wall sleeves), the busbar through-wall conduit excludes conductive parts. While some products employ mechanical clamping, porcelain sleeves and flanges are generally secured with cement adhesive. Copper conductors utilize centering washers and nuts for fixation, whereas copper and aluminum conductors are anchored with centering washers and open pins. To optimize the initial corona, specific voltage levels (20, 35kV) incorporate uniform voltage measures, including enhancing or thickening the porcelain wall and umbrella (edge) near the flange. Additionally, applying semiconductor glaze to certain porcelain areas and baking them short-circuits to improve electric field distribution.
Purpose
In the architecture sector, these conduits play a pivotal role in safeguarding pipelines passing through walls while fulfilling waterproofing, vibration reduction, and other critical requirements. They ensure the structural integrity of buildings and the seamless operation of pipeline systems, proving indispensable across various plumbing, fire protection, ventilation, and other pipeline engineering projects.
In the electrical realm, they are integral in power plants, substations, distribution equipment, and high-voltage electrical appliances. These components facilitate the seamless passage of conductive parts through walls or other grounded structures, providing necessary insulation and support to guarantee the safety and reliability of power transmission.
Key Selection Points
• Type and pattern selection: Determine indoor or outdoor type based on installation context; Choose wall conduit with conductor or busbar type conduit without conductor, aligning with the intended application.
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