A water crane is a device that delivers water to elevated areas and can rotate and adjust its boom to deliver water at varying heights. It can work by using a pump or a reservoir and is typically made of steel or PVC. The flow of water is controlled by a valve, and it is commonly used to fill steam locomotives.
A water crane is a gooseneck device intended to deliver water to an area that is likely to be elevated to at least some degree. In most cases, the device is able to rotate around a single pivot. Depending on the application, it may also be able to raise and lower the main boom to deliver water at varying heights.
The water crane can work in a couple of different ways. Typically, a pump pushes water up the vertical spout and up to the horizontal arm. Once there, it runs up the arm until it reaches the downspout. Upon reaching the downspout, gravity takes over and the water, or any other liquid of your choice, is deposited in a specific location. Some water cranes may work by providing a reservoir in the upper boom where water can be stored and accessed as needed.
While the appearance of water cranes can vary slightly, most simply look like very large water faucets. Most are made from steel, although it is also possible that they are made from a plastic material, such as PVC pipe. The advantage of PVC pipe is that it does not corrode which could happen with any metal product that is in contact with water over a period of time. Despite this advantage for PVC, the metal has the potential to better withstand heavy industrial use.
Adjusting the flow of water for a hydraulic crane is done simply using a valve, just like any other type of faucet. The size of the valve and its rating are determined by the size of the crane, the expected water pressure and the expected level of use. Turning the water on is usually a matter of opening a valve. In some cases, when water is pumped into the crane, it may be necessary to ensure that electricity also flows to the pump, although this is not usually technically part of the hydraulic crane.
The advantage of a water crane is in its ability to adjust in one or more ways to do its job. For example, when watering a steam locomotive, the hydraulic crane positions itself and lowers down to the tank. This allows for quick filling with minimal losses. Once completed, the water crane simply lifts and moves, allowing any taller wagon to pass through. Steam locomotive trains are one of the most common places to see these cranes.
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