The bottom unloading and loading鹤管 is a specialized rigid pipe equipment used for the loading and unloading of liquid media at the bottom of tank trucks. Installed in the low-level area of the loading platform, it connects to the bottom interface of the tank truck through rotating joints and quick connectors. Compared to top loading鹤管, it offers superior sealing performance with no media splashing or evaporation. It is an advanced choice for high-risk, volatile, and high-flow media loading and unloading in the petrochemical industry and is widely used in standardized loading and unloading of tank trucks at large oil depots, chemical parks, and refineries.
Core Structure (Integrated rigid tube design, compatible with low-position sealing loading and unloading)
The overall structure is a modular metal rigid tube design, emphasizing sealing connections, leak prevention, and shock resistance. The core components feature more dedicated quick connection/rapid disconnection units than top-mounted crane pipes, with each module clearly defined in its function.
Supporting rotary unit: Low-position column, heavy-duty rotary joints (2-4 pieces), bearing bases, enabling horizontal rotation of 0-180°/360° and small vertical amplitude, compatible with low-position alignment requirements for tank truck bottom interfaces.
Conveyor Boom Unit: Rigid inner arm, outer arm, and short downpipe, with a shorter medium conveying channel and lower resistance, suitable for high-volume loading and unloading; materials customized according to medium characteristics.
Balanced Effort Unit: Spring Cylinder Balancer / Pneumatic Balancer, lighter boom weight, allowing single-person operation for low-level mating and containment, easy to handle.
Quick Connect Units: Dry Quick Connectors (core), Sealing Clamps, leak-proof connection with the bottom of tank trucks; sealed before loading/unloading, no dripping after loading/unloading.
Safety Protection Unit: Emergency Release Device (ERC, standard), anti-static grounding interlock, oil spill protection device, to address unexpected movements of tank trucks and other emergencies.
Fixed auxiliary unit: Accommodates locking device, low-positioned operating step, saves space on the loading platform, and enhances safety during low-positioned operations.
Core Advantages (vs. Top Loading Crane Hoses / Traditional Flexible Hoses)
Optimal sealing and environmental protection: Bottom dry connection + fully enclosed pipeline, with no medium splashing or volatile leakage, completely eliminating VOCs emissions, meeting the strictest environmental protection treatment requirements.
Higher loading and unloading efficiency: Large diameter pipelines + short conveying channels, with low fluid resistance, the loading and unloading flow rate can reach 200-500 m³/h, 2-3 times that of top-loading crane pipes, suitable for bulk and rapid loading and unloading.
Enhanced operational safety: Standard emergency release device (ERC) automatically disconnects and seals both ends of the pipeline in case of accidental movement of the tank car, preventing medium leakage; anti-static/anti-spill interlock system, eliminating the risk of fire and oil spill accidents at the source.
Easier working environment: low-position operation, no need to climb over trailers, eliminating the risk of high-altitude work; no medium volatilization, odor-free working area, improving the working conditions for operators.
Enhanced equipment durability: Metal rigid pipes have no aging or wear, dry joints are easy to replace, and the equipment's lifespan can reach 10-15 years with low maintenance costs.
