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.