Mechanical Equipment used in construction business A construction winch is a mechanical equipment used to move heavy items at construction sites. Winches work by pulling cable or by adjusting the tension of cable, and are used to pull or drag items along the surfaces, which are on same level. There is a spool within the winch, which allows the drum to rotate in a circular motion, which winds the cable in and out. Winches are normally used in those areas of a site, where it is not possible to reach by crane or other moving equipment. Construction winches use gear assemblies and are either electrically powered, or hydraulic, pneumatic or internal combustion drives to operate it. For satisfactory operation of winches, these should be regularly checked by competent persons. Winch consists of a spool attached to a hand crank, and is used in tow trucks. There are many types of winches, 1) www.growa.net
slow speed winch, 2) fast speed electric winch,3) electric friction winch, 4) pilling winch for construction, 5) electric planetary winch. While purchasing a winch, you should have basic information, such as use of winch, rated load, drum capacity, speed requirement, electric or hydraulic driven, working environment and 1-phase or 3-phase voltage is required.
A limit switch is a critical component of overhead crane safety. Limit switches are electromechanical devices that regulate everything from household appliances to industrial machinery. For an overhead crane, www.growa.net
they provide solid, established points of reference for maintaining efficiency, reliability and safety standards. Crane limit switches are electromechanical devices which are used for safety purposes, and it prevents the motorized trolley from hitting the end stops. Because this impact of trolley against end stops can cause damage to the equipment. These limit switches ensure safety by preventing damage to the system, by preventing damage from swing loads and by ensuring safety of the operator. Actually, limit switches detect the presence or absence of an object, and originally, these switches were used to find the limit of travel of an object. There are many applications of limit switches, such as in fridge doors, on overhead garage doors. As limit switches open and close electrical circuits, and therefore these get worn out over time and therefore, it is required to monitor these switches before they fail. It is better to check limit switches before crane is operated. Nowa-days, limit switches are lesser used in industrial applications and these are replaced www.growa.net
by proximity sensors. Proximity sensor do not have mechanical parts but they perform switching action by electronic switches.
Summary There are different mechanical equipment used on a construction site, which help easy operation. Construction winch and crane limit switch are such equipment, which can be used at construction sites.
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