DV3 series Trolley Mechanism

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Introduction

Such production are independently developed and manufactured by our company based on mature technologies of French Potain Company.It is constitued with torque three-phrase asynchronous motor,build-in planetary reducer, winding drum, rack and other components.The mechanism can get low, medium and high speed by voltage control and eddy current brake.The motor is equipped with an electromagnetic disk brake with features of smooth startup and braking, safe & reliable braking and accurate positioning.

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Q:What are the climbing claws on the tower crane?
Climbing is lifting work cylinder claw pole on the standard main limb rod bearing points of the.
Q:What is the definition of lifting, slewing and luffing of tower cranes?
Rotary is cantilever tower crane tower crane rotary shaft winding;Is the hook shaft distance amplitude change;
Q:What are the construction cranes? 50
National and trade standards for construction and lifting machineryStandard number, building lifting machinery, national and trade standard nameGB 6974.9-1986 lifting machines -- Nomenclature: Tower CranesGB 6974.1-1986 lifting machinery terminology - lifting machinery typeGB 6974.2-1986 lifting machinery terms - main parametersGB 6974.3-1986 lifting machines - Terminology - General conceptsGB 6974.4-1986 lifting machinery terms - bodies and other componentsGB - 6974.5-1986 lifting machines - Terminology - safety indicating devicesGB 6974.6-1986 lifting machines -- Terminology -- mobile cranesGB 6974.7-1986 lifting machines -- Terminology -- Railway CranesCranes; cranes; GB; 6974.8-1986; terminology; floating cranesGB 6974.9-1986 lifting machines -- Nomenclature: Tower CranesGB 6974.10-1986 lifting machinery terms - portal cranesCranes; cranes; cranes; GB; 6974.11-1986; terminologyCranes; cranes; GB; 6974.12-1986; terminology; bridge cranesGB 6974.13-1986 lifting machines -- Terminology -- gantry cranesGB 6974.14-1986 lifting machines -- Terminology -- cable cranes
Q:When the tower crane top height is more than meters
Circular of the Ministry of housing, urban and rural construction on Issuing the measures for the safety administration of sub hazardous and sub divisional projectsAnnex No. [2009]87 [Annex two]"More than a certain size of the risk of larger sub sub project scope."
Q:How much more than m of tower crane jib winch point height should be equipped with anemometer
According to the regulations of JGJ196-2010 for the safety and safety of installation, use and disassembly of tower cranes for construction purposes:
Q:What is the allowable range of vertical deviation for tower cranes?
Previous answers to this question have been made. In the industry standard "construction site inspection of machinery and equipment technical specification" (JGJ160-2008), in the form of mandatory provisions: the tower crane installation height to basic design requirements, the axis of the tower line should be no more than 0.4% of the bearing surfaces of the lateral vertical deviation; after the attachment, the highest attachment point following the vertical deviation should be less than 0.2%. "The basic height of the design requirements" in the "strong regulation", that is, the maximum independent installation height on the site".
Q:Equipment safety of tower crane
Safe distance tower and transmission line is not up to the requirements of the tower frame door frame to design, erection principle to power erection, do not use metal materials, bamboo and other materials can be used. The distance between a bamboo pole and a power line shall not be less than 1m, and a certain degree of stability shall be taken to prevent the wind from blowing. The tower crane height and bottom bearing size ratio is large, and the center of gravity of the tower body, high torque, braking frequency, impact force, in order to increase its stability, we will analysis the main causes of the tilting of the tower crane has the following:Overloading. Different types of cranes usually adopts the lifting torque based control, when the amplitude exceeds the rated load weight increase or the corresponding weights, the overturning moment more than stable moment of it, it may cause the collapse of the tower crane.Two, inclined hanging. Slant weights will increase its overturning moment, the lifting point will produce horizontal force and vertical force on the crane, bottom supporting point will produce an additional overturning moment, and the stability coefficient is reduced, resulting in tower crane collapse.Three, the tower crane foundation is uneven, the ground endurance is insufficient, the perpendicularity error is too big, also can cause the tower crane to overturn the moment to increase, causes the tower crane stability to reduce. Therefore, we should proceed from these key factors to strictly check, check and check, and prevent major equipment personal safety accidents. State explicitly eliminated the model should resolutely prohibit the use of, in disrepair, tower crane in the identification of the repair, to limit the use of load, tower crane for the use of fixed number of years there is no uniform standards, opinions vary, different places have different provisions.
Q:What kind of personnel should be installed for the tower crane installation and disassembly?
2, with special construction operation qualification certificate of construction, lifting machinery, installation, demolition workers, lifting signal workers, lifting drivers, cable operators and other special operations personnel.And an electrician.
Q:What is the difference between lifting height of tower crane and independent height?
It is not the kind of independent highly rigid or flexible attachment function when the tower reached the maximum height, lifting height of the tower is at the maximum height and the minimum amplitude in hook, hook support face datum allows the maximum vertical distance of tower crane.
Q:What are the "2 magnification" and "4 magnification" mentioned in the lifting characteristics table of tower cranes?
Popular saying: "car to hook this section of vertical distance, you see 4 wire rope is 4 magnification, you see 2 wire rope is 2 magnification.".

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