The bottom unloading nozzle is a specialized rigid pipe handling equipment designed for the bottom unloading ports of tank trucks. Installed in the low-positioned area of the unloading platform, it completes the unloading operation of liquid media through dry quick connection and sealed pipeline transportation. Compared to the top unloading nozzle, it offers sealed leak-free operation, higher unloading efficiency, and enhanced safety. It is the mainstream choice for unloading volatile, high-risk, and high-flow media in the petrochemical industry, oil depots, and chemical industrial parks, and is compatible with standardized bottom unloading conditions of truck/train tankers.

Core Structure (Low-position Sealed Design, Emphasizing Fast Connection and Leak Prevention)

The overall structure is modular with a metal rigid pipe design. It features an optimized unloading channel specifically designed for bottom-mounted crane pipes. The core components are engineered around low-position alignment, dry-sealed sealing, rapid unloading, and safety protection. The vehicle/truck models differ only in boom length and swing radius, with the core structure remaining consistent.

Low-profile Support Swivel Unit: Short columns, heavy-duty swivel joints (2-3 pcs), wear-resistant bearing bases, enabling horizontal rotation of 0-180° (standard) / 360° (custom), and vertical adjustment of ±10° to ±20° for minor amplitude changes, compatible with trough trailer parking deviations, and accurately aligning the bottom unloading port.

Short Arm Conveying Unit: Rigid inner arm + outer arm (short arm frame design, reducing flow channel resistance), dedicated short vertical pipe for unloading vehicles, serving as the main medium conveying channel, diameter suitable for high-flow unloading, material customized according to medium characteristics.

Dry Coupling Unit: Low/Normal Temperature Dry Quick Connectors (core) + Pneumatic/Mechanical Sealing Clamps, achieving leak-free connection with the bottom unloading opening of tank trucks, pre-sealed before unloading, no residue after unloading, completely preventing medium volatilization and leakage.

Effortless Balancing Unit: Low-Temperature/Room-Temperature Specific Spring Cylinder Balancer, designed for low-force operation, allowing the boom to remain balanced at any position. One person can complete the entire operation of alignment, unlocking, and containment, reducing labor intensity.

Safety Protection Unit: Emergency Release Device (ERC, standard), Antistatic Grounding Interlock, Oil Spill Protection Device, Emergency Cut-off Valve for Unloading, automatically breaks and seals both sides of the pipeline in case of accidental movement of the tank truck, to prevent leakage accidents at the source.

Auxiliary Mounting Unit: Low-position containment locking device, anti-slip operating step, guardrail – saves space on the unloading platform, prevents low-level operation collisions, and enhances operational safety.

Core Advantages (vs. Top Discharge鹤管 / Traditional Flexible Hose Discharge)

Sealed and environmentally friendly, no leakage: Dry quick connector + fully enclosed piping system, no medium splashing or volatilization throughout the unloading process, completely eliminates VOCs emissions, meets the most stringent environmental standards, especially suitable for volatile media such as gasoline and benzene.

High unloading efficiency, low fluid resistance: Large-diameter short boom design, shorter medium conveying channel, significantly less resistance than the top crane boom, unloading flow rate up to 2-3 times that of the top model, suitable for large batch and high flow unloading conditions.

Operation safe, no high-altitude risk: Full low-level operation, no need to climb tanker trucks, avoiding risks of high-altitude falls, medium splashes causing burns, etc.; Standard equipped with ERC emergency egress device, double-sealed in case of emergencies, preventing leakage accidents.

User-friendly and adaptable: The balancer features an easy-to-use, labor-saving design, allowing a single person to handle connection / unloading / containment; the boom arm can accommodate slot car ±500mm of parking deviation without the need for repeated vehicle adjustments.

High durability and low maintenance cost: metal rigid pipes have no aging or wear, and only the dry joint seals are the wear parts, which can be individually removed and replaced, with a service life of the equipment up to 10-15 years.

Medium residue-free, low loss: Dry connection design ensures no medium residue after unloading, significantly reducing medium loss and enhancing corporate economic benefits.