hoist gantry crane

Cantilever crane is fixed on the cantilever can be fixed around the base of the rotating column , or columns rigid cantilever and transfer , together with the base supporting the rotatable relative to the vertical center line of the column and the composition of the Hoist gantry crane boom . It applies from the weight of small, round or operating the range of services sector occasions. General machine tools and other artifacts used to hold cards and handling. bridge gantry crane jib crane column to use more electric chain hoist as from domestic small -tonnage crane hoisting mechanism and operating agencies , less use of wire rope hoist and chain hoists . Rotation and horizontal movement to use more manual operations , the use of electric only when lifting larger .
1 , rotary wall cranes : Optional XN hoist type chain hoist , CXT wire rope hoists ; condition of A3; size car operation mode selectable electric, manual ; electric lifting way .
2 , selection of key data and purchasing conditions : Starting weight (t), spin wall length L (m), lifting height h (m), plant clearance height (m), rotation angle ( degrees ) , crane types, gourds type, whether to do the foundation , the car runs.

Gantry crane (or overhead gantry cranes)

Conveying way timber haulage ways according to the type of timber, storage size, topography and covers an area that is selected regional requirements, which is currently being conducted among domestic experimental study and gain experience. Now introduce hoist gantry crane several major haulage way. Large timber gantry crane haulage storage sites use more gantry cranes (or overhead gantry cranes) stacking, unstacking, pulling wooden machine horizontal transport, or bridge crane stacking, steel crane unstacking to pull the wooden horizontal transport aircraft fitted. Conveying medium-sized timber frame bar semi-mechanized transport field, then use more stacking frame bar.

Bridge crane girder

On the main beam camber arch girder bridge crane concept refers to the bridge at both ends of the beam on a plane as a reference , the main beam relative to the plane of the beam end bent upward plane. Max crane girder span bent upward at the center of the main beam , the maximum value on the center of the arch is called the camber of the main beam . Camber on the direction of the main beam length of each part of the camber of the track known as the main beam of the curve, or simply camber line. The sino hoist size and shape of the camber curve crane main beam camber on the manufacture and use of cranes are two important technical conditions . Carrying trolley bridge crane in the main beam is running, if the main beam inelastic deformation , the car is always on a straight track running, which is the best , but in fact this is not possible , because the main beam is an elastomer. If the crane made ​​of the level of the main beam , the crane when under load , the position of the main beam load is bound to produce a downward bent , that hoist gantry crane under the so-called main beam deflection . This time as the car runs across the end of the cross , the car itself will likely slip , running instability phenomenon ; And when the car runs across the end of the span to occur when climbing phenomenon , the running resistance of the car increases easy burning motor . On the other hand , if there is a large main beam under torsion , also worsen driving conditions carts run institutions.

Double girder truss gantry crane

With economic development , it is not only occupies an important position in the national economy , but also in the fields of production and life are also expanding. Weight 160t double girder truss gantry crane gantry steel accounted for more than 60% of the whole weight is an important part of the whole crane engineering system design. Rationality and sino hoist reliability of the safety design of steel structures directly determine the ability to work and quality of work cranes ; while irrational steel design parameters will reduce the utilization of resources. Therefore, the gantry crane steel structure design and analysis has become the focus of the design in the field of research . Aiming at this situation , the use of modern design methods , conduct research on the optimization of a shipbuilding hoist gantry crane design theory 160t double girder truss gantry crane steel structure . Firstly, analysis of the current level of research and development trend of domestic crane , according to the shipyard 's design requirements, 160t double girder truss gantry crane steel structure design depth theoretical study proposes a more advanced design, and in ANSYS modeling, finite element analysis of strength and stiffness .

Double door frame is divided into rigid gantry legs hyperstatic

Railway yard gantry cranes ( hereinafter referred to as gantry cranes ) are mostly working in the open air , affected by natural wind . When the wind is greater than the steel crane predetermined value, the machine should be stopped . Or working in the state to stop the crane when subjected to strong winds , probably due to the wind and cause the brake device is not fortified gantry crane was blown away or tipping accidents , and even cause the plane crash . According to " crane safety supervision and inspection procedures " provides crane running on the track in the open-air work ( including rail gantry cranes ) , should be fortified wind devices. Two-stage wind brake effectively solve the wind braking railway gantry crane working state of hoist gantry crane emergency shelter under braking and static state . In the design and manufacture of gantry cranes , the correct choice of two levels of wind braking device is important . Hangzhou Railway Bureau tube gantry crane windproof two types of brake hydraulic brake wheel electric brakes two wind power hydraulic brake wheel brake device is a dual- power hydraulic brake system . In 36/16t gantry crane manufacturing , carts Traveling with double output shaft of the motor (YZR180L-8, 11kW), both sides were assembled brake wheel (φ300 and φ200), wind brake and brake work by the two were often closed electro-hydraulic brake blocks to complete.

Typical gantry crane nonlinear systems

Overhead crane load capacity, flexible operation, in the industrial and transport fields have a wide range of applications . However, the overhead crane is a typical nonlinear , hoist gantry crane coupling, due to the drive system to achieve efficient control of its security is facing many difficulties , therefore , control of such systems has become a hot topic. Various crane control methods proposed in recent years , such as sliding mode control, adaptive control , although theoretically possible , but taking into account nonlinear interference and coupling phenomena that exist in the actual system , its usefulness remains to be tested. Experimental methods have become characteristic analysis system , controller design, stability verification steel crane technology tools. For these reasons , we designed and developed a three-dimensional overhead crane system is automatically controlled experiment , in order to verify the relevant control strategies implemented to provide a great convenience . The system can not only simulate the actual operation of the real good cable car system , and is very easy to test a variety of control algorithms and adjustments. In order to verify the reliability of the experimental system , the number of species on the overhead crane control method is applied to the experimental system , the experimental results are consistent with the theoretical analysis of the original documents , which illustrate the effectiveness of the system. Introduction bridge crane overhead crane system is a typical nonlinear systems owe drive .

Electric hoist gantry crane use common problems in the analysis

Electric hoist gantry crane is a kind of more sino hoist crane, the wharf, warehouse and construction sites and other open Spaces has been widely used. Electric hoist gantry crane hoisting device is all kinds of steel wire rope electric hoist, in order to realize the transportation of goods, or to turn the operation, the need to move up and down before and after the hoist gantry crane hook, moving back and forth around the car and mobile crane cart mobile forms such as combination. The work level applicable to the electric hoist gantry crane between A3 and A4, working temperature, about 25 degrees Celsius below zero to 40 degrees Celsius, the outdoor work, large, car and lifting structure must be set to cover. Main component of electric hoist gantry crane work for supporting institutions, electric hoist, steel door frame and electric control system, they are the core part of the electric hoist gantry crane work, also decided to the working performance of the electric hoist gantry crane is the most main factor. Using issues a, electric hoist gantry crane electric hoist gantry crane, a variety of models 10 tons of LDI type electric hoist gantry crane is widely used in railway construction departments, such as the following to the model electric hoist gantry crane as an example, points out problems need to be improved in use, for everybody to discuss. Electric hoist gantry crane beam and the opportunity to connect parts of the main girder

Hoist bridge crane

Gourd refers to electric hoist bridge crane for lifting mechanism of bridge crane, mainly for small tonnage (less than 10 t) and use frequency sino hoist lifting work sites. Because of its convenient operation and maintenance, lightweight flexible, price is low, so in the light industry, chemical industry, machinery and other industries are widely used in lifting operation. This kind of crane is the ground operation more, generally a professional life is the number, or do not need specialized personnel operation, so the scene, there are many unsafe hidden trouble easily. Of course, not only the hoist bridge crane prone to hidden trouble, some hoist gantry crane types of crane is the existence of insecurity. Lifting equipment common accident features: accident consequences; Accidents have frequent sex, concentration and sudden; The accident types associated with the kinds of hoisting equipment; Accident injury crisis of range and concentration. Caused the main reason of the accident has the following several aspects: mechanical operation personnel in operation and maintenance of the violations; The negative impact of the mechanical work environment in there are obstacles on the run, for example, in the job site along with high; Mechanical equipment itself safety performance is not good. It might be against standard design, manufacture or installation problems left by the bad; Natural phenomena occur suddenly. Such as earthquakes, floods, etc.

Simulate the crane work

With traditional two-dimensional CAD design of crane time cycle is long, repeated design, product innovation is insufficient, the engineer's design experience is not very good inheritance, makes the design efficiency of series of products is not ideal. Bridge crane is designed to experience of design, development, evaluation, manufacturing cycle repeatedly, the process time is long, and the design cost is high, the efficiency is low, the risk is big. And the sino hoist of modular design, through the component level, generalization and standardization can simplify the product structure, make the product diversification. At the same time using the parameterized design of gantry crane and 3 d parametric modeling technology, can reduce repeated labor and improve the design efficiency, make products to satisfy user needs. At the same time using an interactive simulation technology, the bridge crane driver's operating system can be virtual simulation, set up the corresponding effects, truly simulate the crane work and working conditions, to predict the potential risks in the working process of the bridge crane, and can improve the work efficiency of bridge crane.hoist gantry crane as interactive simulation tool, has great advantages in terms of interactive simulation. Through the, can realize the keyboard to control the 3 d model and the man-machine interaction effect because of the bridge crane bridge block design.

The structure adopts steel structure industrial building

At present, most of the industrial hoist gantry crane structure adopts steel structure, all kinds of span, the cross section of the steel crane beam needs more and more. Compared with more than 10 years ago, when the steel crane beam in the design of product quality requirements, especially further strict to the requirement of welding quality; And, because the owners of construction period limit makes the steel crane beam production cycle have to further compression; Second, due to the increasingly fierce competition in steel structure manufacturing, make the bid have been almost zero profit in the competition, all contractors have to excavate the potential to reduce the steel crane cost from various channels. Steel crane beam is one of my company's main steel structure products, accounting for about 50% of the annual steel structure manufacturing tasks. My company to undertake the EGang cold rolled sheet plant engineering main factory main rolling across different and finished 1/3 blocks of steel crane beam installation tasks, a total of 64, including 15 m across 56 root, 9 m across 4, 2.2 welding position: CO gas shielded welding using short 2 road transition welding, suitable for flat, vertical, horizontal, and all position welding. 2.3 current density, current density is high, the molten drops high fusion rate and is suitable for the welding process of single-sided double-sided forming. 2.4 welding deformation, heat concentration, heat affected zone 21 m across four root; Material Q235 - C 32, small wood, after welding deformation is small.

The safe operation of the enterprise lifting equipment

Hoisting equipment safe operation of township enterprises existing problems and countermeasures of the economic system reform continued to deepen, the villages and towns set is common, according to the statistics data show that about 70% of body economy got a rapid development, the production steel crane the traffic, electricity enterprise lifting equipment operators without card mount guard. Ladder, the big increase in the number of tower crane and other lifting equipment. But the technical force is weak, the personnel quality is poor. Village and township enterprises, due to many hoist gantry crane enterprises do not know the lifting equipment safety industry from staff to management, most without technical management technology, the hoisting equipment purchase, installation, operation and management training to mount guard work, technical quality is poor, lack of lifting equipment, there are a lot of problems, lifting equipment accidents frequently maintenance knowledge, to repair and maintenance, lifting equipment is not happening. Statistics show that from 1990 to 1995, the city leads to lifting equipment often run in spite of illness. Township enterprises lifting equipment by less than three hundred to three hundred in order to ensure the safety of the hoisting equipment of township enterprises economy more than five hundred; Lifting equipment accident of inductrial injury accident caused by the operation, do well the safety in production, promote enterprise development, improve the rate from 2% to 2%. Hoisting equipment accident rapid economic benefits, the author thinks that must do the following work: speed increase, not only seriously affected the normal production of township enterprises to strengthen publicity and education, increase awareness of production safety.

Lifting machinery safety procedures

Lifting machinery safetysteel crane have been enacted 25 years of GB/T6067-1985 "hoisting machinery safety regulation, in June 1, 2011 by GB6067.1-2010" hoisting machinery safety procedures part 1: general rules "(hereinafter referred to as the new rules) replacement, the new rules focus on system safety, to adapt to the application of new technology, new material and update of the standards, in line with international standards. The new regulations as a hoist gantry crane national standards, to improve lifting machinery safety requirements, to reduce the lifting accident rate and ensure the safe operation of the hoisting machinery, will play a positive role in promoting. The new regulations mainly has the following characteristics. To adapt to the extensive and comprehensive system the new procedure from system concept, highlight the partition of security system and induction, is a adapt to the extensive and comprehensive system of hoisting machinery safety technical guidance. First of all, the new regulations applicable to the design, manufacture, installation, alteration, maintenance, use, scrap, check and so on eight aspects, than in the past the old rules added three parts installation, modification, maintenance. Secondly, the new regulations in order to adapt to the special requirements of various types of lifting machinery safety technology, considering from the function of the hoisting machinery and institutional characteristics, the old rules broken down into seven parts, the first part is the general rules; The second part as mobile crane; The third part is the tower crane.

The basic construction of bridge crane is the same as the hook bridge crane

The basic construction of bridge crane is the same as the hook bridge crane, the difference is on the hook to hang a dc lifting hoist gantry crane (also known as the electromagnetic sucker), used for lifting with magnetic conductivity of ferrous metals and their products. Usually after in bridge walked electric generating set on the stage or in a driver indoor SCR dc to ac power to dc power supply, and then through the trolley frame of special cable drum, dc power supply with flexible cable to lifting electromagnet. Bridge crane bridge crane has three types: grab hook bridge crane, electromagnetic hook bridge crane grab and electromagnetism bridge crane. Its characteristic is everywhere in one car is equipped with two sets of independent lifting mechanism, a set of grab bucket, a hook with (or a set of steel crane chuck with a hook, or a grab for magnetic chuck with a set of use). According to the need can use hook lifting heavy objects, and can also be on the hook to hang a motor grab unloading material, also can unload the grab to hang black metal disk lifting, so called three bridge (renewable) using a crane. As a result, the models must be the same with electromagnetism bridge crane, set up the electric generator or SCR dc power box. This kind of crane is applicable to often change for plant material place. Double bridge crane this crane and hook bridge crane basic same, just the bridge rack is equipped with 2 sets up the same weight of the car. This model used for lifting and handling elongated objects.

Crane controller

If compared the behavior of the crane to a single pendulum, then experienced crane operators can eliminate many payload oscillation caused slowdown in the process of oscillation, cancel the hoist gantry crane process of oscillation. However, some types of payloads and rigging double in these conditions, dynamic so even skilled operation manual method of eliminating oscillation become very difficult. As a result, some researchers have suggested increasing feedback control to suppress the double pendulum is dynamic. The steel crane of using feedback control, due to the difficult to measure the payload of the bill. Therefore, this article does not advocate feedback control, but the shape control command, don't need sensors. Crane controller, is actually the real-time vibration suppression, it must be produced from human command signal to filter out unnecessary incentives. Such changes can be generated by convolution with humans a command signal pulse sequence. Convolution results, and then used to drive the crane motor. Driving crane.

Bridge crane is horizontal plane in workshop, warehouse and yard over the material lifting hoisting equipment

Bridge crane is horizontal plane in workshop, warehouse and yard over the material lifting hoisting equipment. Because of its ends located in tall cement posts or metal stents, shape like bridge. Bridge hoist gantry crane bridge along the laid on on both sides of the elevated rail longitudinal operation, can make full use of bridge the space below the lifting materials, from the ground equipment obstacles. Used in construction hoisting machinery, according to its structure and properties of different, general can be divided into small light lifting equipment, bridge type hoisting machinery and boom type crane three categories. Small light lifting equipment such as: jack, hoist, winch, etc. Bridge type hoisting machinery such as beam cranes, steel crane crane, etc. Boom type crane such as fixed slewing crane, tower crane, truck crane, tires, crawler cranes, etc. The following is a kind of hoisting machinery of: (1) mechanical truck crane hydraulic truck crane crane all terrain off-road vehicle (2) tower crane crane rail type rotary tower crane rail type rotary ZiSheng on tower crane rail under the rotary tower crane rail type rotary ZiSheng tower crane fast loading type tower crane tower crane car tyre combination tower crane crawler tower crane tower crane (3) the crawler crane crawler machinery hydraulic crawler crane crawler crane electric hoist mast crane cable type mast crane sprag type mast crane cable crane radiant cable crane translation type cable crane type cable crane

Bridge crane is very widely used in industrial and mining enterprises, a kind of hoisting machinery, bridge crane, and more than a locomotives now attachment

Bridge crane is very widely used in industrial and mining enterprises, a kind of hoisting machinery, bridge crane, and more than a locomotives now attachment, use frequently, every day a lot of work. Bridge crane can work directly affect the completion of tasks of locomotive overhaul and the safety of person and equipment. Drag the original use of bridge crane system consists of wound rotor ac asynchronous motor, the rotor resistance multistage speed regulation in the series circuit, the CAM controller, the relay - hoist gantry crane control, the main shortcomings of this control system is: the motor rotor series resistance speed governing energy consumption type of slip speed regulation, large energy consumption and mechanical properties of soft, small range of speed regulation, and the smoothness is poor; Mechanical shock, steel crane the service life; Therefore, only completely change the way the original speed regulation can fundamentally solve the problem of bridge crane high failure rate. With the rapid development of electronic technology, frequency conversion speed governor performance, reliability, all had the very big enhancement, for its application in bridge crane drive system provides favorable conditions. We first for locomotive diesel engine assembling important work to 32 tons bridge crane frame of the big car drag system and hook system for frequency conversion transformation, to improve its operating performance, reduce the failure rate.

Work type and weight of the crane are two different concepts

Work type and weight of the crane are two different concepts, the weight is big, not necessarily is heavy, the weight is small, also is not necessarily the light level. Such as water power station with the crane lifting weight of hundreds of tons, but very few use opportunity, is only used when installing unit and repair unit, the rest of the time is down there, so even though the weight is very big, but still belongs to the light level. And as the station yard gantry hoist gantry crane, while the weight is not big, but the job is busy, belong to the type of heavy work. Crane type of work and safety performance has a very close relationship. Lifting weight, span, lifting height of the same crane, if different type of work, in designing and steel crane, the safety factor is not taken by the same, or different parts model, size, specification. Brake, due to the different type of work, such as wire rope safety coefficient of different levels (light safety coefficient is small, heavy security coefficient), selected models is not the same. As is 10 t bridge crane, again for the work of the intermediate type (JC = 25%) of the hoisting motor power for N = 16 KW, for the heavy work types (JC = 40%) hoisting motor power is N = 23.5 KW.

Loader job working device should be able to guarantee

Loader job working device should be able to guarantee: when turning cylinder are blocking,sino hoist arm oil cylinder lifting or landing, up and down link mechanism make the bucket translation or close to translation, to avoid tilt bucket and scattered material; When the movable arm in any location, bucket spinning the movable arm hinge point hoist gantry crane during discharging, bucket Angle is not less than

45 °, movable arm fall after unloading and can make the bucket flat automatically.

Wharf cranes crane equipment such as the lack of development

Although in recent years the construction, port construction implementation, wharf cranes and other  sino hoist  equipment have been relatively rapid development. But in the rapid development, we still need to know that we exist some shortcomings, after all, only the presence of such awareness, enterprises or individuals, what we need to know. Understand their own disadvantages and advantages to be able to truly realize their own progress and development.
1, the domestic equipment manufacturing enterprises crane overall design of the low level, especially in innovative design ability, mostly stay in the imitation stage, the product level is difficult to improve.
2, the market most of the small scale enterprises hanged machine, subject to market constraints, some companies generally do not have to take it as a major product development, manufacturing processes and equipment generally lag behind.
3, from the point of view of product marketing in recent years, a lot of product quality, but off, poor reliability, resulting in high failure rate, hoist gantry crane  safety has become a topic of concern to society in general.
4, cab and interior design has long been a weak link in crane design, supporting industries lack of capacity also affects the overall level of product improvement.
5, product specifications less, generally only 1 to 2 business sizes, it is difficult to meet the needs of various users at home and abroad. In addition, the product update cycle is long, some enterprises for product upgrading is not enough emphasis.
6, technical services are not in place, the level is not high, the lack of an effective technology to track products. In products and services, domestic enterprises and foreign crane larger than the gap, but also improve the comprehensive service system.
7, as in recent years, rising raw material prices, the manufacturing cost is high.
     In the face of these developments lack of  steel crane  equipment, crane manufacturing enterprises should integrate research efforts for technological breakthroughs, improved product mix; facilitate planning of production, reducing costs; while enhancing quality of products and services, I believe so, China's crane equipment development will be more rapid, open foreign markets to occupy foreign markets just round the corner.

Wharf crane operation three small dots Precautions

 Today begins the pier quay  hoist gantry crane  outside many occasions together, in order to ensure safe operation, afar as we propose three small dots requirements, to help you while avoiding disadvantages, better use of crane equipment.
1, lifting site selection should be appropriate
     Operation should be smooth lifting spacious venue selection, ease of accidents, the timely evacuation of danger zones.
2, the lifting process should establish stable fixed point
     To confirm the operation, stable foothold: standing mechanical equipment and lifting objects stacked,overhead gantry crane you should pay attention to the foot without slipping and tripping hazards.
3, lifting position should avoid harmful
     Operation should avoid the loss of ability to function in the direction as lifting heavy objects that could fall in operation or slipped, asymmetrical lifting will produce a swing and rotation, hanging objects running there kinetic energy. Therefore, the operator hung suspended in the need to avoid the attention and directing these harmful orientation.
     Wharf  overhead bridge crane  operation errors caused by security incidents are not uncommon, we must not empirically work, pay more attention to the operation is an effective means of avoiding accidents.