Single girder gantry crane electric automatic correction method

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Large span single girder gantry single girder gantry crane to be automatic correction, the first to analyze the reasons for the deviation and phenomena produced, and then take the corresponding corrective measures. Usually have the following types of electrical automatic correction methods:
1, by comparing the crane just the leg side carts go round and soft leg-side carts go round the actual operation of the line speed, which can be driven with a rubber friction wheel rotary encoder for closed-loop control method for correction;

  2, when the legs just legs and soft sides of the motor speed is not the same, such as the average speed of the motor than just the leg side leg side motor soft fast 1/1000, which can be calculated gantry Semi-gantry crane  pulse encoder input pulse number of methods to carry out corrective PLC;
  3, the angle between the single-girder crane girder with flexible legs more or less than 90 degrees, this method can be installed on top of the soft legs in angular displacement sensor to correct;
  4, directly next to the rail mounted parallel to the leg side and just soft leg-side carts run some sensing point, measured using a proximity switch proximity switch action just the leg side and soft side of the leg and has an input method for PLC input correction .

Bridge crane

In a rectangular field and over the job, and more for workshops, warehouses, open yard loading and unloading goods, etc., the beam cranes, bridge cranes, gantry cranes, crane cable, carrying bridges.
(1) girder cranes: girder Shipbuilding gantry cranes including single girder crane and double girder bridge crane single girder overhead crane bridge girders using a combination of multi-word section steel and steel or steel type. Often lifting trolley hoists, electric hoist or hoist lifting mechanism as part assembled. Press the bridge is divided into two kinds of support and hanging. The former car beam bridge crane along the orbit; the latter along the suspension bridge truss crane plant in orbit. Single girder overhead crane sub-manual, electric two kinds. Manual single girder overhead crane operating speeds lower bodies, from the weight of too small, but little of their own quality, ease of production, low cost, suitable for carrying small amounts without power after, do not ask for speed and productivity occasions. Manual single girder overhead traveling cranes with manual monorail car as the car is running, hand pull gourd as a lifting mechanism, bridge girder by girder and end components. Girder generally use a single beam, side beam is formed by bending steel or steel plate welded. Electric single girder overhead crane operating speeds, higher productivity than the manual, since the weight as well. Electric single girder overhead crane from the bridge, traveling mechanism, hoist and electrical equipment and other components.

(2) overhead crane:
Bridge crane bridge is a bridge crane runs on an elevated track, also known as Crane. Bridge crane lay on both sides of the bridge along the elevated track running lengthwise, lifting the car along the track laid on the bridge sideways, forming a rectangular scope of work, you can take full advantage of the space below the bridge lifting materials, not hampered by ground equipment. Bridge crane can be characterized so hang on hooks or other devices extract heavy lifting in space to achieve vertical or horizontal transport. Bridge crane include: lifting mechanism, large car run institutions. With the action of these organizations rely on, can in a certain weight lifting and handling cubic space. Overhead cranes, gantry cranes, crane, metallurgical bridge cranes, cranes, etc. are examples of such cable. Bridge single girder gantry craneis widely used in indoor and outdoor warehouses, factories, docks and other places open storage yard. Bridge crane bridge crane can be divided into ordinary, simple beam bridge crane bridge crane and metallurgical dedicated three. Ordinary general by lifting trolley bridge crane, bridge run institutions, bridge metal structures. Lifting trolley lifting mechanism also consists of trolley run institutions and small frame of three parts. Lifting mechanism includes a motor, brake, reducer, drum and pulley. Motor through reducer, driving drum rotation, so that the rope around the roll or from roll down to lift heavy objects. Small frame is the bracket and install the hoisting mechanism and trolley run institutions and other parts of the frame, usually welded structures.

The future situation of the Gantry Crane

Currently,  Gantry Crane machinery is in a market of rapid development, the giant has a large market potential for development. With the increasingly rapid modernization of hoisting machinery requirements are also increasing, to large-scale  Shipbuilding gantry cranemachinery, automation, specialization trend.
Large-scale
Since the new century, large-scale projects to accelerate the trend of domestic super crawler cranes slowly began to appear in front of everybody. 1,000-ton, 2000-ton crawler cranes have been introduced, the prelude to our super crawler crane rapid development. Currently on the market the largest crane sales for 5 ~ 8t products, accounting for over 50% of total sales. Because many manufacturers, intensified price competition, product margins increasingly narrow profit margins and large tonnage products far exceeds the small tonnage products. From the direction of development of the domestic car chassis, the market grew rapidly large tonnage truck, FAW, heavy truck and other manufacturers are speeding up the development of large-tonnage truck chassis, so large tonnage bridge crane products will vary large tonnage market expansion chassis gradually increase over 2011 products 10t less than 30% of total sales, in the first half of this year more than 10t product 33% of total sales in the next few years, large tonnage, serialized bridge crane products will have a larger space for development, the demand was gradually increasing.
With the start of large-scale projects,  Gantry Crane and transport of materials for  Gantry Cranemachinery to provide a broader space for development, market demand is growing, industry prospects.
Automation

The rapid development of hoisting machinery industry has greatly promoted the application of automation products in the industry. Although the overall level of automation applications  Gantry Crane machinery industry is not high, but whether it is  single girder gantry crane machinery or lifting machinery manufacturers users have come to realize the advantages of applications where automation products.
Director of the China Academy of Building Research Technology Center Construction Mechanization Research Branch, said Luo Wenlong, automation products in lifting machinery industry is huge potential, prospects are very broad. Under both the trend towards more mature and modern urban development patterns, or the economic crisis, the country's investment in stimulating infrastructure, Chang said the lifting machinery are booming. From the control to the drive and automation products in the application of the depth of the industry has become cumulative. From the existing scale, future growth and the current growth rate, lifting machinery industry has gradually become automated enterprise market should not be overlooked.
Specialization
With the national electric power, petrochemical, steel, transportation and other infrastructure construction reached its climax, the rapid expansion of domestic crane market, the trend of large crane has become an irreversible fact. In order to reduce production costs, saving manpower and resources, the demand for large cranes has gradually expanded requirements for crane  Gantry Crane capacity is growing. Hoisting speed is higher and higher, it is bound to the energy performance requirements for crane control and increasing. As automated production processes in the important part, simple operation, safe, reliable, easy to maintain a basic requirement for cranes, in addition, the high cost of  Gantry Crane machinery market will be more in the future.
To this end, a variety of work to meet the needs of specialized cranes continue to be developed and put into use, there is nuclear power, paper, waste disposal and other special cranes. The crane also has special properties to meet a variety of work environments, such as corrosion, explosion-proof, insulated cranes. Conventional rail, ship cranes special performance has also been enhanced adaptability to the environment is also rising.
Imagine, as the country's urbanization around soon start and accelerate development, including the construction of many railway transportation, building construction, energy, water conservancy and so on all aspects of the development of China gave the crane industry provides a broader development prospects. The next 3 to 5 years time, Chinese crane market will be more exciting, 100 tons to kiloton product type spectrum will be more intensive, technology will be more mature, people will gradually from the initial breakthrough for Chinese enterprises series of the world's largest surprise in to calm down, deeper into the engineering applications and user needs.
Faced with a good momentum of development of  Gantry Crane machinery industry should focus on machinery, technology, research and proposed  Gantry Crane equipment for sustainable development strategies, although China has now entered the high-end, but for independent innovation, build their brand, promote the strategic development, with leading the development of innovation, and then go do their own ability to achieve long-term development of the industry, to establish awareness of intellectual property rights should be strengthened to cultivate.