YONGMAO STL230 tower crane

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Product Description:

Tower Crane Model Type:Luffing

Max. Lifting Capacity:18/16/12T

Tip load:2.0/2.0/2.0T

Arm Length:55M

Independent Height:48.2M


Founded in the year of 1996, Yongmao is one of the key suppliers specialized in manufacturing construction machinery and engineering equipment.

We currently offer a variety of tower cranes which are broadly classified under the Topless STT series, the ST series, the Luffing STL series and the Derrick QD series, as well as crawler cranes and modified vehicles.

Yongmao tower cranes have not only been working for various domestic projects like hydroelectric power plants, nuclear power plants, shipyard, wharf, bridge, aerospace etc. but also acting in numerous construction projects all over the world.

Yongmao appreciates the reliance and confidence given by its valuable users all over the world and feels very proud of its ability and capability to contribute value added services to its users both at home and abroad.

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Q:Method for operating tower crane
2.21, drivers must pass the escalator up and down, up and down the escalator, hand tools are prohibited items.2.22 do not drop any objects from tower cranes or defecate.2.23 winter in tower crane operating room heating, should be taken to prevent electric shock and fire measures.2.24 any tower crane with an elevator must comply with the instructions in the elevator manual. No overloading or violation of the operating procedures.2.25 multi machine operation, should avoid two or more than two tower cranes overlap in the radius of rotation. Special circumstances, need to overlap operations, must be safe distance between the vertical arm to ensure the safe distance and the lifting of materials, and have reliable safety measures approved by the competent technical leadership before construction.2.26 jib cranes in heavy lifting off the ground after lifting, rotating and walking three actions can be done at the same time, but the amplitude only alone, strictly with variable load. A crane that allows variable amplitude loading shall not vary at full load or near full load.2.27 lifting hoist is not installed in the rotating part of the crane, lifting operations may not continue in one direction continuous rotation.2.28 a crane with a mechanical torque limiter must adjust the tonnage indicator of the overload limit device according to the radius of gyration and the rated load at that radius.2.29 bend rail subgrade must comply with the provisions of the crane should turn on the outer rail surface of the sand, rail, rail and wings painted with grease. The counterweight box shall be turned to the direction of the outward turn. It is strictly prohibited to do lifting or turning on heavy roads.
Q:About tower crane torque limiter with 4 limit switches, each play a role, thank you
The maximum amplitude control: when the weight exceeds or prohibit increase load rate of more than 105% or greater than the maximum amplitude (amplitude limit) output control, allowing the car to be near range by car distance to increase amplitude is prohibited.Minimum range control: when the amplitude is less than the minimum amplitude (amplitude lower limit), the output control allows the car to move to a distant range, i.e., to increase
Q:How often should the crane be inspected regularly?
Crane safety supervision regulations twenty-fourth in lifting machinery safety regular supervision and inspection cycle for two years, elevator and manned elevator safety regular supervision, inspection cycle for a year.Eighteenth lifting machines should check the lifting machines regularly, including annual inspection, monthly inspection and daily inspection:I. at least one full inspection shall be carried out annually on the lifting machinery used.The load test can be carried out by lifting the heavy load which is equivalent to the lifting weight, and checking the safety performance of the mechanism such as lifting, running, turning and amplitude according to the rated speed.Lifting machines which have not been used for more than one year should be examined comprehensively before use.Crane in case of four or more earthquakes or major equipment accidents, outdoor work crane after more than nine winds, should be used before a comprehensive inspection.
Q:Tower crane installation, wind speed is greater than 12m/s, wind should stop operation,
Surface wind speed is greater than 6
Q:Which is the main basis for the disassembly and assembly process planning of tower cranes?
Before the installation and disassembly of 2.0.10 tower cranes, special construction plans shall be worked out to guide operators to perform installation and disassembly operations. The special construction plan shall be prepared according to the actual conditions of the product specifications and the working site of the tower crane, and shall comply with the requirements of the relevant laws, regulations and standards. The special construction plan shall be examined and approved by the technical, safety and equipment departments of the unit, and approved by the technical person in charge, and shall be approved by the supervision unit.2
Q:Tower crane and tower crane 5
Tower crane, tower crane, also known as tower craneTower crane = tower crane = tower craneThere are many ways of vertical transportation. Construction elevator hoist etc..Tower crane features: large operating space, mainly used in housing construction materials vertical and horizontal transmission and installation of building components.It consists of three parts: metal structure, working mechanism and electrical system. The metal structure includes the tower, the boom and the base. The working mechanism has four parts, lifting, luffing, turning and walking. The electrical system consists of motors, controllers, power distribution cabinets, connecting lines, signals and lighting devices, etc..
Q:What are the working mechanisms and safety devices of tower cranes?
About the structure: Tower cranes are all metal structures, so far there is no wood. About institutions: tower crane working mechanisms are: winding lifting mechanism; luffing mechanism; slewing mechanism; cart moving mechanism; lifting mechanism. A safety device: four limit: height limit, amplitude limit, slewing limit, travel limit; three insurance: luffing rope insurance, car insurance broken shaft, the hook to prevent falling insurance; two limit: torque limiter, weight limiter on these roughly.
Q:What are the necessary safety devices on a tower crane?
(1) lift height limit position limiterFor cranes with variable boom angles, the lifting motion must be stopped immediately when the top of the lifting device rises to the 8OOmm at the lower end of the boom.For luffing cranes, lift the top of the hook to the lower end of the frame 500mm. The lifting movement must be stopped immediately.(2) lifting moment limiter and maximum lift limiter;When the lifting torque reaches 90% of its rated value, the lifting torque limiter shall be able to issue an acoustic or red light to indicate the alarm. When the lifting torque exceeds its rated value and reaches 108% of the rated value, the lifting direction and outward direction shall be stopped.If the weight and amplitude indicator are set, the numerical value should be correct, clear and eye-catching. The digital error shall not exceed 5% of the indicated value.When the lifting weight exceeds the maximum weight, maximum lifting weight limiter should emit light or sound alarm, when the load exceeds the maximum weight of 6%, should stop to enhance the direction of movement, but to allow institutions towards the down direction.
Q:Lifting tower crane tower more than 45 meters, the demolition cost and how to adjust the field Sinotrans transportation fees?
Self lifting tower crane tower 45 meters high to prevail, such as height of over 45 meters, each increased to 10 meters (less than 5 meters, excluding) demolition costs increase 20%, off-site transportation costs increased by 10%.
Q:What windproof devices should be set up for crane work?
4. windproof anti-skid safety deviceThe utility model is a safety device for preventing the crane of the open-air work from sliding along the track under the action of strong wind, and the outdoor working track type crane shall be installed. The safety function of the utility model is that when the crane encounters the maximum wind force in the non working state, the crane is not blown to prevent the crane from overturning at the end of the rail. Common windproof devices include rail clamps, anchoring devices, and iron shoes.(1) rail clamping device: it is widely used in all kinds of outdoor track crane, its working principle is to use the two sides of a clamp rail head, the crane is fixed on the track through the combination of the clamping force, the crane can not slip. The design requirements of rail clamp, clamping force of rail clamp must be greater than the crane sliding force, to ensure that the local maximum wind, crane stays closed; rail tongs should rely on device components own weight or spring, and should not only rely on the driving effect of the power of the driving device, to to prevent the power supply is interrupted, the rail clamping device does not work; power driven rail clamping action should be behind the operation mechanism of brake action violently to eliminate possible crane brake.(2) anchor device: it uses a bolt or a flashboard device, a chain or a top pole to connect the crane and the track foundation into one body, and is used for fixing the crane in the big storm when not working. Since the anchor device can only be located in a certain position of the track, the crane can be anchored to this position, which is not suitable for immediate weather protection in an emergency.(3) iron shoes: it is a wedge device, when used, the wedge-shaped tongue inserted between the wheel tread and rail top surface, the iron shoes of the slope constitute the resistance to sliding wheels.

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