The鹤管, also known as a liquid loading and unloading arm, consists of rotating joints, inner arms, outer arms, vertical pipes (for land use), three-dimensional joints (for ship use), balancers, control systems, and other components. It is primarily used as loading and unloading equipment for liquid media in truck tankers, rail tankers, or tank ships.
The characteristics of the crane pipe:
1. Compared to the old-style flexible hose connections, the鹤管 utilizes a rigid connection method, coupled with safety features like emergency disengagement, effectively preventing bursting or cracking incidents, offering a high degree of reliability.
2. The rotating union is made with superior double-roll track technology, offers easy 360-degree rotation, is leak-proof, and is convenient for maintenance and care.
3. The flexible, balance-weighted spring cylinder balancer ensures easy and effortless operation of the loading and unloading arm. It allows for single-person operation to connect pipes with tank trucks, facilitating smooth control over the loading and unloading process.
4. Customized dimensions according to customer's loading and unloading range requirements; during the process, follow the tank truck's movement within its normal range.
5. Pipes are made from materials such as carbon steel, stainless steel, and aluminum alloy, depending on the type of liquid medium, ensuring a long service life.
6. Pipes can be lined with PTFE and equipped with heating systems, capable of transporting various liquid media such as hydrochloric acid, asphalt, etc.
7. Utilizing an enclosed loading and unloading operation method, it can reduce the volatilization of the medium, mitigating environmental pollution.

Principle of鹤管 installation:
1. Necessary safety measures should be taken during installation to prevent accidents and ensure the safety of personnel and equipment.
2. The connection between the pier and the crane pipe should be equipped with a standard flange corresponding to the crane pipe, with the flange approximately 3.7 to 4.0 meters from the track surface.
3. Assemble by referring to the working diagram, install from the base rotator to the vertical aluminum tube, from bottom to top, and attach the balancer.
4. When installing the balancer, first raise the oil feed arm to about 60°, install the pins on both sides of the balancer onto the hooks, then align the single ears of the pull rod on one end of the balancer with the ears on the housing of the lifting and rotating sleeve, install the pins, and finally install the open pins.
5. When adjusting the balancing force, place the oil transfer pump in a horizontal position. Unscrew the end cover of the balancer to see the adjustment screw. If the crane pipe tends to fall freely, tighten the screw with a socket wrench. If the crane pipe has an upward tendency, loosen the screw until the oil transfer arm stabilizes within the range of approximately -5° to 60°.