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Product Description

Product Description

>>>Main Paramters of Electric Tower Cranes

Model              QTZ80(6571)        
Max Load 8 t
Tip load 1.0t @56 m
Jib length 60m
Mast 1.8*1.8*2.8 m
Hoist height according to your demand
LIft speed (a=2) 100/50/10 m/min (a=4) 50/25/5 m/min
Trolley speed 22/24 m/min
Slewing speed 0.62 r/min
Jack clmbing speed 0.4 m/min
Main electric Schneider

>>>Safety Feature for Construction Electric Tower Crane

1   Torque limiter it will warns when lifting weights reach to 90% of rated lifting torque.
When reach to 110% of the rated lifting torque, it will limit rising upwards and trolley.
2 Weight limiter Control the maximum lifting capacity.
lifting weight reach to 40% of the rated capacity, limit high-speed lifting;
lifting weight reach to 110% of the rated capacity, limit  the lifting up
3 Height limiter Control the lowest and highest extreme position of lifting hook
4 Slewing limiter Control the extreme turns number of turn left and right
5 Amplitude limiter Control trolley limit position of inward and outward
6 Overload protection If the material is over the capacity, the crane will give a sharp warning for protection itself
7 Emergency brake If the operation staff  encounter some emergency situation, we could start the emergency brake system to protection the related treasure
8 Control Method Room control or remote control to avoid any injury to the operation staff
9 Main lifting motor with thermal protection and currency protection

>>>Our Advantage for Electric Tower Crane

1.We are group company but also manufactuer,which have more than 10 years export experiance

2.we can direct sale the crane towers for you with high quality and competitive price

3.We can customized for you, the working height, working radius, max load capacity and so on

 

>>>What We Supply for Electric Tower Crane

Model Standard Model Jib Length/m Tip load /t Max Load/t
QTZ31.5 4208 42 0.8 3
QTZ40 4808 48 0.8 4
QTZ50 5008 50 0.8 4
5571 50 1.0 4
QTZ63 5571 50 1.0 5
5013 50 1.0 6
5610 56 1.0 6
QTZ80 5610 topless 56 1.0 6
5513 55 1.3 6
6571 60 1.0 6
6571 60 1.0 8
QTZ125 6015 60 1.5 8 or 10
QTZ160 6516 65 1.6 10
QTZ250 7030 70 3 12 or 16
QTZ315 7040 70 4 16 or 18
QTZ400 7055 70 5.5 25

>>> Our Service for Electric Tower Crane

Pre-sale Service
1. We can customize products according to client’s demand. Various types of tower crane for your choice.
2. Good Quality & Factory Price & Quick Response & Reliable Service, are what we are trying best to offer you
3. All of our products are produced by our professional workmen and we have high efficiency sales team, you can totally trust us.
4. We have more than 20 years experience in designing and manufacturing, we cherish every order from our honored clients.

After your selection
1. We will count cheapest shipping cost and make invoice to you at once.
2. Test each machine before delivery to ensure their quality, then send out to you after your payment.

After-sale Service
1. Our engineers are available to guide the operators abroad. 
2. We are very glad that customer give us some suggestion for price and products.
3. If you have any question, please contact us freely by E-mail or Telephone

>>> Main Parts Brand We Use

>>>Packing Delivery
Steel structure naked or packed by bubble. 
Electric part and easily demand parts packed by high quality plywood box

>>>Payment Terms
1.T/T
2.LC
3.Western union

>>> Company Information 
Tavol Cranes Group
 is the professional crane and lift platform manufacturer in China .

We Design,Manufacture,Installation,Repair,Maintenance,Trade and Export following products:
+ Top Kit Tower Crane, Topless Tower Crane, Building Hoists etc.
+ Scissor Lift, Cargo Lift, Wheelchair Lift , Dumbwaiter, Dock Ramp etc

 

>>>Contact
 If you are interested in electric tower crane, please no hesitate to contact us with following parameters:
1. Max crane height under jib ?
2. Working radius?
3. Max load ?
4.Tip load 

Best Regards 
Kitty Yang

>>>Our Service

Pre-sale Service
1. We can customize products according to client’s demand. Various types of tower crane for  your
 choice.
2. Good Quality & Factory Price & Quick Response & Reliable Service, are what we are trying best
to offer you
3. All of our products are produced by our professional workmen and we have high efficiency sales
team, you can totally trust us.
4. We have more than 20 years experience in designing and manufacturing, we cherish every
order from our honored clients.

After your selection
1. We will count cheapest shipping cost and make invoice to you at once.
2. Test each machine before delivery to ensure their quality, then send out to you after your
payment.

After-sale Service
1. Our engineers are available to guide the operators abroad. 
2. We are very glad that customer give us some suggestion for price and products.
3. If you have any question, please contact us freely by E-mail or Telephone

>>>Packing Delivery
Steel structure naked or packed by bubble. 
Electric part and easily demand parts packed by high quality plywood box

>>>Payment Terms
1.T/T
2.LC
3.Western union

>>> Company Information 
Tavol Cranes Group
 is the professional crane and lift platform manufacturer in China .

We Design,Manufacture,Installation,Repair,Maintenance,Trade and Export following products:
+ Top Kit Tower Crane, Topless Tower Crane, Building Hoists etc.
+ Scissor Lift, Cargo Lift, Wheelchair Lift , Dumbwaiter, Dock Ramp etc
 

>>>Contact
 If you are interested in 5t –25 tons tower crane, please no hesitate to contact us with following parameters:
1. Max crane height under jib ?
2. Working radius?
3. Max load ?
4.Tip load 

 

After-sales Service: Yes
Warranty: 12 Months
Certification: CE, ISO9001
Condition: New
Maximum Lifting Height: 100-150m
Maximum Lifting Weight: 6t
Customization:
Available

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Customized Request

pulley

The Mechanical Advantage of a Pulley

A pulley is an important tool for many tasks. The advantage that it offers over a hand-held mechanism is its mechanical advantage. In this article, we’ll discuss the types of pulleys and their applications. We’ll also look at the types of compound pulleys. And, of course, there’s a little bit about the mechanical advantage of a pulley. This article will help you decide whether this tool is right for your needs.

Mechanical advantage of a pulley

A pulley has a mechanical advantage over a lever because it is able to produce more force over longer distances. The mechanical advantage of a pulley sounds brilliant and could produce energy. But what exactly is this mechanical advantage? Let’s take a look. First, consider how a pulley works. A rope supports a 100kg mass, which requires 500 newtons of force to lift. If the rope supports a 100kg mass, two sections of rope can support that load. Using a pulley, you can lift the same weight with half the force.
A pulley’s ideal mechanical advantage is the ratio of the force applied to the total length of the rope. The larger the radius, the greater the mechanical advantage. A pulley made up of four rope segments has an ideal mechanical advantage of four. Therefore, a four-segment pulley would multiply the force applied by four. As the numbers on the rope segments are smaller than the total length of the rope, it would be better to use a compound pulley.
The mechanical advantage of a pulley can be calculated by using the T-method. The first step in calculating the mechanical advantage of a pulley is defining the force you need to lift. Then, divide that force by two to calculate the amount of force you need to lift the load. Once you know this amount, you can design a pulley to meet your needs. That way, you can achieve the perfect balance between the two types of pulleys.

Types of pulleys

The main function of the pulley is to change the direction of the force. The mechanical advantages of a single pulley are two. Ideally, two pulleys should have two or more mechanical advantages. The mechanical advantage of compound pulleys can be increased to two or more. The number of pulleys that make up the composite pulley will determine the mechanical advantage. Certain types of pulleys are combined in one housing.
A stepped pulley is a set of pulleys with stepped surfaces. Each face is anchored to the mid-axis in an ordered sequence. This design gives these pulleys their name. They are used to increase and decrease the speed of the driven pulley. Step pulleys are usually used in pairs. They can be straight or stepped, but usually come in pairs.
The three main types of pulleys are pulleys, rope pulleys, and chain pulleys. Pulley Pulley systems use mechanics to lift and lower heavy objects. The Greek historian Plutarch credits the invention of the pulley to Archimedes of ancient Sicily. The Mesopotamians used rope pulleys to lift water around 1500 BC, and Stonehenge is said to have been built using a rope pulley system.
pulley

Application of pulley system

The advantages of using a pulley system are numerous. The ability to lift heavy objects is a good example. The pulley system makes it easy for people to lift blocks and other large objects. It can be used in many different applications, from utility elevators to construction cranes. In addition, it is widely used on sailing boats. If you want to learn more about the benefits of a pulley system, keep reading!
You can use the pulley system to water flowers or water plants. Some of them even lowered the pot to make cleaning easier. Pendant lights are another great place to install a pulley system. Climbing and fishing are just some of the activities that utilize the pulley. They are great for fishing and gardening. And since they are so versatile, you can use the pulley system anywhere.
To get the most out of your pulley system, you must choose a product that has all of the above attributes. A high-quality pulley must have a large pulley diameter and be made of sturdy materials. The cables must also be properly supported in the pulleys to ensure a long service life for your investment. A good cable should have minimal cracks and be lubricated. These factors are the most important considerations when choosing a pulley system for your needs.

composite pulley

Composite pulley systems combine two or more movable pulleys. These systems maximize the force to move the weight and can also change direction so they can be used to lift weights. Composite pulley systems can be as simple or as complex as your needs. For example, a pulley pulley system uses multiple pulleys on each axis. This method is often used for hoisting building materials.
A compound pulley system has two or more rope segments, each of which is pulled up on a load. It can increase lift by making objects move faster. These systems are common on large sailboats and construction sites. Composite pulleys are also available for larger boats. Due to their versatility, they are versatile tools for construction sites and large sailboats. If you have their app, you should consider buying one.
The main advantage of composite pulleys is their versatility. You can use them to lift weights or use them to save energy. Composite pulleys are especially useful for lifting heavy objects. For example, you can tie a paper clip to the end of the rope and pull it up. The flag is then lifted into the air with the help of compound pulleys. Composite pulleys are a great invention and they are often used in construction.

security considerations

There are several safety considerations to consider when using pulleys. The first is Secure Workload (SWL). This value is a general guideline for the maximum weight a pulley can safely handle. It varies according to the height and angle of the pulley. Besides SWL, there are some other factors to consider. Consider each one before deciding on the pulley that best suits your needs.
Another safety consideration is the weight of the load. Since the highs of the pulley are higher than the lows, it doubles in weight. The weight of the high point should not exceed 4 kN. The safety factor is calculated by multiplying the strength of the pulley by the weight of the load. Secondary COD has a safety factor of 10:1 and bulletproof primary anchors should be used with pulleys.
If using a chain hoist, you must be trained in the appropriate type of lifting. It is important not to hang on the top hooks of the structure, nor to overload or rig the hooks with multiple slings. You should also avoid corroded or damaged chains, as they can cause the crane to jam or overload. A worn chain can even cause the load to drop.
pulley

Components of a pulley system

Proper design of the pulley system can increase the life of the cables and pulleys. Larger diameter cables should be selected as they are more durable than smaller diameter cables. The cables should also be supported in the pulley grooves. The pulley must be designed to be compatible with the cable and its lubrication should be optimal. Proper lubrication of cables and pulleys will ensure maximum durability and longevity.
The first type of pulley is called a fast pulley. These pulleys are used for quick start and stop of the machine. These pulleys are usually mounted in pairs on the countershaft of the machine. One pulley is tightly mounted on the machine shaft, while the other pulley is fitted with a free-spinning mechanism. When the machine is running, the belt is mounted on the tensioner pulley, and when it is stopped, the belt slides on the independent pulley.
Composite pulley sets reduce the overall effort required by reducing the size of the pulley. These are usually attributed to Archimedes. Flat pulleys are often used in flat belt driven transmission systems. These are used in high-speed, low-power applications. Flat pulley idlers are also used on the back of traditional V-belts.

China Standard Tower Crane Spare Parts Nylon Pulley 6013 Nylon Wheel   idler pulley	China Standard Tower Crane Spare Parts Nylon Pulley 6013 Nylon Wheel   idler pulley
editor by CX

2023-07-12