What is a Hydraulic Gantry?
A Hydraulic Gantryis a lifting machine that consists of a jack (leg) equipped with a telescoping mechanism such as a hydraulic cylinder and a beam (beam) arranged in a gantry shape to move a heavy object set at the bottom or top of the beam directly above or below by means of jack expansion and contraction.
Hydraulic Gantrys are called “gantry” because they look like a gate, but they are also called “bridge lifters” or “gantries” because of their shape. The word “gantry” refers to a gantry-shaped structure with horizontal beams at the top of multiple legs.
The traveling frame is equipped with wheels, allowing the gantry to travel with a heavy load being lifted. Some can also move horizontally to the left or right. There are a variety of types, from small ones with a lifting capacity of about 1 ton to large ones with a lifting capacity of over 1,000 tons, as well as a variety of beam lengths, lifts, strokes, and so on. These lifting machines are suitable for safely moving heavy objects under conditions where cranes cannot be used due to the shape, restrictions, or capacity of the building.
Usage of Hydraulic Gantry
Hydraulic Gantry is often used to move heavy objects in confined spaces where cranes cannot be used due to site environmental restrictions, such as in buildings with low ceilings, in tunnels, or where there are obstructions such as electric cables above the building. They are also used as alternative equipment in buildings where overhead cranes cannot be installed (e.g., buildings that are not strong enough, leased buildings, etc.).
Hydraulic Gantrys lift weights by extending and retracting jacks. Because the load can be directly slung on the special hanger, there is little lifting loss, and the beam height can be freely changed by extending and retracting the jacks according to the obstacles in the sky.
When moving long or heavy loads, using a crane or forklift is unstable and dangerous. In such cases, two Hydraulic Gantrys can be used for safe and efficient movement. Hydraulic Gantrys of various sizes and shapes are used depending on the environment in which the heavy load is to be moved.
Hydraulic Gantry Principle
Hydraulic Gantry has a hydraulic or electric jack powered by electricity, and a beam at the top of the jack. The beam has special hangers (rings) attached to it to hold the load, or it can be a deck on which the load is raised.
To move a load under the beam, the load is placed under the beam, the jack is retracted, and the load is hung from the hangers attached to the beam before being raised. For lifters using a deck, the jacks are retracted to lower the deck, the load is placed on top of the deck, and then the deck is raised.
Hydraulic Gantrys are moved by a motor or other power on wheels at the bottom of the jack for large lifters. Some smaller ones are pushed by human power. Operation is controlled by an operating switch (panel) connected to a control panel.
Types of Hydraulic Gantrys
Hydraulic Gantry are available in a variety of types, such as beam lifting and deck lifting, as well as in the weight of the cargo to be handled, lifting capacity*1, stroke*2, and span*3.
1Lift: Distance between the bottom of the hanger hole and the ground (or the top of the rail if a rail is laid).
2 Stroke: The amount of travel from full extension to full retraction of the jack.
3 Span: Distance between the centers of the left and right jacks (horizontal distance)
Hydraulic Gantry can be disassembled and reassembled into individual parts. This allows the lifter to be brought to the required location and assembled for use whenever necessary, without limiting the location of use, thereby improving the investment efficiency of the equipment.
How to Select Hydraulic Gantry
Hydraulic Gantrys, both large and small, handle heavy objects that cannot be lifted by humans. Therefore, safety is the most important factor in selecting and using a gantry lifter. In addition, it may not be possible for the company to handle problems such as breakdowns or collapsed loads on its own.
When selecting a machine, it is important to consider not only the specifications of the individual machine, but also the installation method proposed to suit the environmental conditions at the site of use and the support system, including maintenance and upkeep.