Portal crane belongs to bridge cranes type. Bridges of portal crane are installed at boxlike or lattice supports, which are travelling by under crane ways. Portal crane is the most widespread kind of load lifting equipment in Russia. Its popularity resides in strength of metal structures and mechanisms, as well in long period of operation. At different types of enterprises portal cranes are used for handling various loads. Frequently, portal cranes operate up to 20 years in temperature range from -40 to +40 degrees of Calcium. Portal cranes belong to most demanded products in construction industry and in other spheres as well. The main spheres of portal cranes applicability are open elevated structure, close manufacturing premises, fire-hazardous and highly explosive objects, works with bulk cargo, handling and installation works.
Portal cranes are subdivided:
- Portal cranes operating at open areas with Нlifting= 20 m;
- Building portal cranes (buildings and structures);
- Portal cranes for handling works;
Installation-dismantling of portal cranes
Portal crane installation begins from assembling of its cargo-carrying bridge and supports. After that enlarged assemblies are transferred between under-crane ways and joint each other by means of bolt packs, hinge axis and welds. Legs of tower are secured to crossbars of travelling bogies, installed at railways in advance. Main bridge elevation with joint supports is performed with a help of heavy-load-lifting cranes or by means of pulley block and winch by strapping bearing supports of portal crane. Portal crane installation is completed by testing, mechanisms adjustment and commissioning operations.
Dismantling of portal crane is a rare operation, which is carried out at the end of its service life or incase of equipment redeployment. Portal crane dismantling is carried out in reverse order in respect of its installation procedure. Full dismantling is performed only in case of non-serviceable condition of equipment.
For portal crane dismantling special special-purpose machinery is used. Its load capacity directly depends on the weight of portal crane and installation area, where the necessary works will be carried out.
Maintenance and repair of portal crane
Modern procedures of portal cranes maintenance provide the necessary level of operating safety at construction object, decrease probability of damages resulting in decrease down time. Portal crane maintenance is a whole spectrum of engineering measures preventing premature wear of equipment by performing preventive inspections, revealing malfunctioning, its elimination or repair.
For normal portal crane operation it is necessary to organize its periodical monitoring, revealing by specialists any possible defects: cracks on metal structures, mechanical damages, and maximum permissible wears. Regular inspections permit to reveal defects at early stages, to prevent premature tower crane overhaul. In course of portal crane operation special attention must be paid on railways condition, observance of loads lifting rules, provision crane stability in workless condition and observance of safety rules.
In course of crane operation it is compulsory to use system of schedule preventive repairs, regular inspections of cranes, adjustment and lubrication of separate assemblies and details in accordance with manufacturing factory instructions, systematic supervision of bearing crane structure state and its mechanisms. Timely repairs of handling equipment are important factor of costs reduction of any organization.
Portal cranes and LLC «Gantry-Crane Service»
Our company activity is based on many years' experience of handling equipment installation works performance. Our specialists excellently know installation procedures and have a good possibility of orientation in repair of load-lifting equipment. Dealing with installation, dismantling, maintenance and repair of portal cranes, we always find out new way to eliminate problems and improve our skills.
We offer the following:
- Consulting services and departure of our specialist at the object;
- Installation/dismantling of portal cranes of domestic and outside manufacturers of any level of complexity;
- Replacement of load and carriage cables;
- Maintenance works in volumes agreed with Customer;
- Any kind of electrical equipment and portal crane metal structures repair;
Built-up of price for services provided by LLC «Gantry-Crane Service» on portal cranes takes place in the following way:
- Studying of a Customer application;
- Selection the model and modification of portal crane by charges of the enterprise;
- Development of technological solution of the stated task;
- Compilation of commercial offer;
- Agreement of the price with a Customer.
There are many companies providing similar services nowadays, but we are not afraid of competition! Our Customers, having addressed to us once, acquire long-term and reliable partner!
Any advices on appeared questions you may receive from our specialists calling us by phones indicated at web-site of LLC «Gantry-Crane Service».
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