TOWER CRANE QTZ31.5 lifting mechanism adopts speed regulation by frequency control
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- Loading Port:
- Qingdao
- Payment Terms:
- TT or LC
- Min Order Qty:
- 1 unit
- Supply Capability:
- 6 unit/month
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The tower crane is a hydraulic tower crane with swing top, horizontal jib and mobile trolley. It has the hoisting moment for315Kn.m;the maximum hoisting load of 3t and the maximum working radius of 39m.The hoisting height of anchoring tower crane is 25m and that of climbing tower crane is 100m.
The tower crane has ingenious design, beautiful shape and simple structure .It is easy to operate and maintain, and is safe and at a reasonable price .It is an ideal construction machines for construction enterprises. It has hoisting mechanism, swing mechanism, top-rising mechanism and radius mechanism, which can work individually or cooperatively to make a high efficiency. The top-rising mechanism is used to raise or lower tower. The hoisting mechanism has 3-speed electronic motor respectively for high, medium and slow hoisting speeds. It has flexible swing mechanism and radius mechanism and slewing mechanism for vertical and /or horizontal transportation of building materials in one time.
The tower crane has complete and sensitive protection devices such as hoisting weight limiter, hoisting moment limiter, hoisting height limiter, radius limiter and swing limiter to ensure of regular operation. It also has rest platform, guardrail and other protection devices. Driver’s cab is at a side of rib and has big space and wide visual field.
The tower crane has excellent performance and is suitable for hoisting in short civil or industrial buildings or loading or unloading in ports or goods yards
1 Main technical Parameters
Name | Unit | Index | |
QTZ31.5 | |||
Nominal hoisting moment | kN.m | 315 | |
Max. hoisting weight | t | 3 | |
Rated hoisting weight at jib nose | t | 0.734 | |
Working radius | m | 2.5~39 | |
Height | Independent | m | 25 |
Attached | m | 100 | |
Hoisting Speed | Ratio. |
| 2 |
Hoisting speed | m/min | 42/21/7 | |
Swing speed | r/min | 0.45/0.7 | |
Radius speed | m/min | 33 | |
Top-hoisting speed | m/min | 0.7 | |
Weight(independent) | t | 19.5(21) | |
Ballast weight | t | 5 | |
Max. swing radii | m | 39.75 | |
rear swing radii | m | 10.37 | |
Max. working wind speed | m/s | 20 | |
Max wind speed for top rising | m/s | 13 | |
Working temperature | ℃ | -20~40 | |
2 Technical Parameters of Main Parts
Name | index | |||||||||
hoisting structure | Electric motor | model | YZS200L1-4/8/24 | |||||||
power | kW | 15/15/4 | ||||||||
Rotating speed | r/min | 1440/730/220 | ||||||||
Decelerating motor | model | JZQ400 | ||||||||
Central distance | mm | 400 | ||||||||
ratio | 15.75 | |||||||||
Arrester | model | YWZ-200/25 | ||||||||
Braking moment | N.m | 200 | ||||||||
Hydraulic propeller | YT1-25 | |||||||||
Steel wire | 6*19-12.5-1670-I-right twisted | |||||||||
swing mechanism | Epicyclical reducer | model | XX4-63 | |||||||
Reducing ratio | 195 | |||||||||
fluid coupling | YOX-220A | |||||||||
Slewing ring | 011.32.1120 | |||||||||
Electric motor | model | YD112M-6/4 B5 | ||||||||
Power | kW | 2.2/2.8 | ||||||||
Rotating speed | r/min | 950/1440 | ||||||||
radius changing mechanism | Electric motor | model | Y100l2-4 | |||||||
Power | kW | 3 | ||||||||
Rotating speed | r/min | 1430 | ||||||||
reducer | model | WCJ-120 | ||||||||
Reducing ratio | 38 | |||||||||
Steel wire | 6*19-6.2-1570-I-right twisted | |||||||||
Lifting mechanism | Electric motor | model | Y100L2-4 B5 | |||||||
power | kW | 3 | ||||||||
Rotating speed | r/min | 1430 | ||||||||
Hydraulic oil cylinder | HSGK-125/90-1320 | |||||||||
Rating pressure | MPa | 16 | ||||||||
- Q: A solid answer and links would be nice.Your help and/or attempts to help are appreciated
- It's actually a POST WWII story: Sadako Sasaki, a Japanese girl who developed leukemia at age eleven as a result of exposure to atomic radiation when she was two years old, began folding paper cranes in observance of a Japanese belief that the gods will grant a wish to anyone who folds 1000 cranes. Although she died a year later, her friends took up the mission, and the paper crane has become a symbol of the hope for world peace. The site below tells the story far more movingly than this summary.
- Q: Tower cranes sometimes have very long booms, but seem to usually have fixed counter-weights at fixed positions behind the cab. Why doesn't it flip backwards when there is no load, or flip forwards when a load is way at the far outward end of the boom? It seems to be a very large range of moment arms given that the counter-weight has a fixed one.
- I think the counter weights are connected to a pully system that directly interacts with the boom and hook movement. This way it can put more or less pull on the weights according to the amount of weight or position of the weight on the crane.
- Q: i probably sound like an idiot asking this question :Pis it electricity? fossil fuel burning involved? pulleys? how does the pulley work? any human power involved? specifically, how is it stupid to lift a chair that can be lifted by a person, with a crane?
- Most cranes are diesel engine powered hydraulics and hydraulic motor. So that would be fossil fuel. Some cranes use pulleys to magnify the total lifting capacity. A pulley magnifies work by exchanging distance for lifting power. For example, to lift a 10 ton weight 20 feet in the air, if you put four pulleys in there so that 80 feet of cable would have to be pulled up , then it would only take 1/4 the amount of power to lift that 10 tons (2.5 ton lifting force would lift it) Look at any links or wikipedia for how compound pulleys work.
- Q: What are the three different types of Cranes?
- Skid Loader Tower Gantry
- Q: What should I do with them? who would accept them if I donated them?
- My brother-in-law won my niece an orange, Halloween cat from a crane when she was very small. She carried that cat everywhere. However, she recently lost it. I've been googling for a replacement. Is there any chance that you have an item like that in your menagerie? And to answer the original question, Salvation Army and Goodwill are great places, but so are state and federal organizations like the Department of Social Services and local Police Departments or Fire Stations. I work for DSS and many agencies like that give away a stuffed animal to any child involved in a case. Just a thought.
- Q: ↑ pretty much explains itself. (:~Animal_Lover
- no!! why would i when i can make my own cranes!!! and why would i want paper cranes anyways!!
- Q: Operation points of tower crane (tower crane)?
- Safe use requires the use of tower crane, issued by the state competent authorities shall abide by the rules and regulations, but also comply with the relevant provisions in the manual: the crane working environment temperature is -20~40 degrees Celsius, the maximum working pressure is 205N/m2, when should stop using the winds of more than 6 level; the same construction site to install more than two sets of tower crane when should pay attention to the location of each tower, take the elevation of different operations, in order to avoid the tower crane jib, balance arm collision accidents; safety device of tower crane, luffing and slewing height, mass and moment limiter, the last two more important, if the two is not detected qualified, will be regarded as the unqualified, because it plays a role to ensure the safety and prevent the tilting of the tower crane. As a construction site, the tower crane torque limiter failure or to replace the operating personnel mistakenly believe that daily only hanging 800-1000kg materials, not what the risk, the results in a process of lifting materials, because of the construction site is narrow, hanging by the operator sight blocked, hanging objects hanging on building the steel frame, caused by tower crane shaking, was the occurrence of major accidents, thanks to the ground work riggers promptly notify the operator immediately stop to avoid rollover accident of tower crane appeared. It is obvious that all safety devices on the tower crane are essential and must be checked regularly to ensure that all the safety devices are in good condition, sensitive and reliable.
- Q: Two cranes can unload a ship together in 8 hours. The faster crane takes 12 hours less than the slower crane, if each were to unload the same ship alone. How long does it take for each crane to unload this ship?
- I'm surprised by how difficult and convoluted the other answers are. They're also wrong. If two cranes are working together and one crane can, in fact, do the job in two hours, then it cannot possibly take longer than two hours with the help of another crane. That makes no sense just by simple reasoning. So the answer of 2 and 14 hours is not correct. Not even close, really. Here's the simple, neat, and correct approach using basic algebra with no assumptions necessary or made: If crane 1 can unload at a rate1/x per hour, then crane 2 can unload at 1/(x+12) per hour since it takes 12 hours longer. The two cranes combined, unload at 1/8 per hour, which must be faster than either one alone. Example: If I can eat a pie in 3 hours and you can eat a pie in 6 hours: 1/3 + 1/6 = 3/6 = 1/2, so together we can eat a pie in just 2 hours... less time than either one alone. Makes sense. Back to the cranes, then: 1/x + 1/(x+12) = 1/8 (2x+12) / (x^2 + 12x) = 1/8 16x + 96 = x^2 + 12x x^2 - 4x - 96 = 0 (x - 12) (x + 8) = 0 - x = 12 or -8 Since the rate cannot be -8, the answer is x = 12 Crane A can unload all by itself in 12 hours. Crane B can do it in 24 hours, and together they can do it in just 8 hours. Check: 1/12 + 1/24 = 3/24 = 1/8 Their combined rate is, indeed, 1/8 per hour!
- Q: Have to make 10 of them so yeah very useful 2 me:) thanks.
- Here okorder /
- Q: if the crane starts out at ground level and the skyscraper is being built next to it, how does the crane get moved to the top of the building once the skyscraper has been built to the level of the top of the crane? (eg: the crane can reach a height of 30 stories but the building being const. is 100 stories)
- It is usually self-hoisting. There is motor and gear assenbly that lifts the crane within the tube (usually a future elevator shaft) the is constructed around it. Then it is bolted down and goes back to work.
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TOWER CRANE QTZ31.5 lifting mechanism adopts speed regulation by frequency control
- Ref Price:
-
- Loading Port:
- Qingdao
- Payment Terms:
- TT or LC
- Min Order Qty:
- 1 unit
- Supply Capability:
- 6 unit/month
OKorder Service Pledge
OKorder Financial Service
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