China Standard Dy Type Double Wheel and Single Wheel Snatch Pulley Block pulley assembly

Description du produit

Snatch Block / Snatch Pulley Block With Hook or Eye

1. Material lifting equipment
2. High quality drop forged steel
3. Safety factor of snatch block: 4: 1
4. Hook (hs type) or eye (es type)
5. Capacity of snatch block: 0.5t~10t
6. Optional: Single wheel or double wheel
7. Sheave diameter: 75-350mm
8. Wire rope diameter: 8-28mm
9. Popular in Europe, Middle-East, North America, South America, & etc

Features of Snatch Block:
1. Durable powder coat finish
2. Heavy-duty permits to perform under extreme condition.
3. Rated loads is from 2MT to 50MT.
4. Safety factor: 4 times.
5.200% over load capacity test 1 by 1 before package.
6. Manufactured according to ISO9001 quality standard
7. CE and GS approved.

All our activities are accredited to ISO 9001 and based on delivering the highest quality possible, both in products and services, ensuring long-term benefits and optimum performance. Also we got the below certification: CE GS SUV, LR ABS ( anchors and anchor chains) Our rigging hardware is manufactured under exceptional quantity control and strictly adhered to the US, DIN, JIS, BS and AS standards. 
About sample:
    Cost with free If the quantity small, and the express charge account into buyer's, after receiving the official order, the seller deducts it in first order's

Please do not hesitate to contact us, should there be any questions or enquires.

—————-FAQ————–
 

Q1: Does your workshop have products in stock?

A1: Yes, we have. But we only have standard-sized products; if you need customized products, it will take some time to manufacture them.

Q2: Whether you can offer customized service?

A2:  Yes, the working condition of every customer is different. All of our products can be customized depending on customers' requirements. Please give us the information as straightforward as you can, so we can provide our best design to suit your demands.

Q3: How to confirm the working class of the crane?

A3: Please offer us the working environment, working duration, and frequency of the crane, and our engineer shall calculate it for you.

Q4: What kind of package for the hoist?

A4: Hoists and Electricals packed in wooden fumigation box. The main beams are covered by woven plastic cloth.

Q5: What kind of assistance can you offer with equipment installation?

A5: We have a professional installation team who has gone to many countries to assist with the installation. If you need us to send a technician to your factory, please let us know.

Q6: What payment terms can you accept?

A6: Our also supports L/C, D/A, D/P, T/T, Western Union, and MoneyGram payments. For example, FOB HangZhou, CIF, DDU, EX WORKS, etc.

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Comment fonctionnent ensemble plusieurs poulies dans un système de palan ?

Dans un système de palan, plusieurs poulies sont utilisées en combinaison pour créer un avantage mécanique, permettant de soulever plus facilement des charges lourdes. Les poulies d'un système de palan fonctionnent ensemble de la manière suivante :

1. Répartition de la charge : le poids de la charge à soulever est réparti sur plusieurs brins de corde ou de câble qui passent à travers les poulies. Cette répartition du poids permet de réduire la force nécessaire pour soulever la charge.

2. Avantage mécanique : L'avantage mécanique d'un système de palan est obtenu en augmentant le nombre de segments de câble qui supportent la charge. Chaque poulie supplémentaire augmente le nombre de segments de câble, ce qui réduit à son tour la quantité de force nécessaire pour soulever la charge. L'avantage mécanique est égal au nombre de segments de câble supportant la charge.

3. Répartition de la tension : lorsque la charge est soulevée, la tension du câble ou de la corde change. Dans un système de palan, la tension est répartie entre les différents segments de câble ou de corde reliés aux poulies. Cette répartition de la tension garantit que la charge est soulevée de manière uniforme et évite toute contrainte excessive sur un seul segment de câble.

4. Disposition des câbles : les poulies d'un système de palan sont disposées en deux groupes : les poulies fixes et les poulies mobiles. Les poulies fixes sont fixées à un point fixe, comme une poutre ou un plafond, et ne bougent pas. Les poulies mobiles sont fixées à la charge à soulever et peuvent se déplacer librement. La disposition des poulies détermine l'avantage mécanique et la direction de la force requise pour soulever la charge.

En combinant ces principes, plusieurs poulies dans un système de palan permettent de soulever efficacement des charges lourdes avec un effort réduit. L'avantage mécanique fourni par les poulies permet de soulever des charges qui seraient autrement trop lourdes pour être soulevées manuellement. Les systèmes de palan sont couramment utilisés dans diverses applications, notamment la construction, le gréement, la voile et les installations théâtrales.

What role do pulleys play in modern elevators and hoists?

Pulleys play a crucial role in modern elevators and hoists, enabling the smooth and efficient vertical movement of loads. They are integral components of the lifting mechanisms, providing mechanical advantage and facilitating safe and controlled operation. Here's how pulleys are used in modern elevators and hoists:

1. Lifting Mechanism: In elevators and hoists, pulleys are part of the lifting mechanism that moves the load vertically. They are typically combined with cables, ropes, or belts to create a pulley system. By distributing the load's weight across multiple lines and changing the direction of the applied force, pulleys make it easier to lift heavy loads. The number and arrangement of pulleys can vary depending on the specific design and requirements of the elevator or hoist.

2. Counterweight Systems: Modern elevators often utilize counterweight systems to offset the weight of the elevator car and reduce the amount of power required for operation. Pulleys play a crucial role in these systems by guiding the cables connected to the counterweight. As the elevator car moves up or down, the counterweight moves in the opposite direction, balancing the load. The pulleys in the counterweight system help distribute the weight and ensure smooth movement.

3. Traction Control: Pulleys are also involved in the traction control mechanism of elevators and hoists. Traction elevators use ropes or belts that pass over a series of pulleys, known as sheaves, to create traction. An electric motor drives the sheaves, causing the ropes or belts to move. By adjusting the rotational movement of the sheaves, the speed and direction of the elevator or hoist can be controlled. The pulleys in the traction control system enable precise and reliable operation.

4. Safety Systems: Pulleys play a crucial role in the safety systems of elevators and hoists. For example, in traction elevator systems, overspeed governors utilize pulleys to detect excessive speed and activate the safety brakes in case of a malfunction. The pulleys in these safety systems help monitor and control the elevator's speed, ensuring passenger safety.

5. Maintenance and Service: Pulleys in modern elevators and hoists are designed to be durable and require minimal maintenance. They are often equipped with sealed bearings or other lubrication systems to reduce friction and wear. This ensures the longevity and reliability of the pulley systems, minimizing downtime and maintenance costs.

Overall, pulleys are essential components in modern elevators and hoists, enabling vertical movement, providing mechanical advantage, ensuring safety, and facilitating efficient operation. They contribute to the smooth and controlled lifting of loads, making elevators and hoists reliable and indispensable tools in various industries and buildings.

Can you explain the basic principles of pulley mechanics?

Pulley mechanics are based on a few fundamental principles that govern the operation of pulley systems. Here's an explanation of the basic principles:

1. Mechanical Advantage: The primary principle of pulley mechanics is mechanical advantage. A pulley system allows for the multiplication of force applied to the rope or belt. By distributing the force over multiple segments of the rope or belt, the load becomes easier to lift or move. The mechanical advantage gained depends on the number of pulleys used in the system. The more pulleys in the system, the greater the mechanical advantage.

2. Force Transmission: When a force is applied to one end of the rope or belt, it creates tension that causes the pulley to rotate. As the pulley turns, the force is transmitted to the load attached to the other end of the rope or belt. This force transmission allows for the movement and manipulation of objects in pulley systems.

3. Directional Change: One of the key principles of pulley mechanics is directional change. A pulley system enables the operator to change the direction of the applied force. By redirecting the force along a different path, a pulley system allows for force to be exerted from a more convenient or advantageous position. This directional change is particularly useful in situations where the force needs to be applied vertically, horizontally, or at an angle.

4. Conservation of Energy: Pulley mechanics also adhere to the principle of conservation of energy. The work done on the load by the applied force is equal to the work done against the load's weight. Through the pulley system, the input force is transformed into an output force that moves or lifts the load. The energy input and output remain the same, but the pulley system allows for the distribution and transformation of forces to achieve the desired mechanical advantage.

5. Speed and Torque Conversion: Pulleys can also be used to convert speed and torque in mechanical systems. By varying the size of the pulleys or using pulleys of different diameters, the rotational speed and torque can be adjusted according to the requirements of the system. This speed and torque conversion allows for the optimization of power transmission and the matching of different rotational speeds between input and output components.

6. Multiple Pulley Systems: Pulleys can be combined in systems to achieve increased mechanical advantage or to create complex motion patterns. In systems with multiple pulleys, such as block and tackle arrangements, the load is distributed over several segments of rope or belt, further reducing the effort required to lift heavy objects. These systems are often used in cranes, elevators, and other applications where heavy lifting is necessary.

These basic principles of pulley mechanics form the foundation for the understanding and application of pulleys in mechanical systems. By harnessing mechanical advantage, force transmission, directional change, conservation of energy, and speed/torque conversion, pulley systems provide a versatile means of lifting, moving, and manipulating loads in various applications.

éditeur par CX