How to determine whether the safety lock of the hand chain hoist meets international safety standards?

How to determine whether the safety lock of the hand chain hoist meets international safety standards?

1. Introduction
As a common lifting equipment, the hand chain hoist is widely used in industrial production and daily life. As an important part of the hand chain hoist, the performance of the safety lock is directly related to the safety and reliability of the equipment. With the development of globalization, international safety standards have gradually become an important basis for measuring product quality. This article will explore from multiple angles how to determine whether the safety lock of the hand chain hoist meets international safety standards.

2. Basic functions and functions of the safety lock of the hand chain hoist
The safety lock of the hand chain hoist is mainly used to prevent the heavy objects from falling due to equipment failure or operating errors during the lifting process, and to ensure the safety of operators and equipment. Its main functions include:
Braking function: After the heavy object is lifted, the safety lock can reliably lock the chain to prevent the heavy object from sliding down.
Anti-unhooking function: Prevent the hook from unhooking due to improper operation or external force.
Self-locking function: When the chain is unevenly stressed or the equipment is tilted, the safety lock can automatically lock to prevent the heavy object from falling.

3. Development and requirements of international safety standards
International safety standards are usually formulated by authoritative organizations such as the International Organization for Standardization (ISO) to unify product quality and safety requirements worldwide. The following are several important standards related to hand chain hoist safety locks:
ISO 4307: Safety requirements for lifting equipment, which specifies safety standards in the design, manufacture and use of lifting equipment.
ISO 12100: General principles for mechanical safety design, emphasizing risk assessment and safety protection measures for mechanical products.
EN 13155: European safety standard for lifting equipment, which specifies the structural strength, material selection and test methods of lifting equipment in detail.

4. How to determine whether the hand chain hoist safety lock meets international safety standards
1. Materials and manufacturing process
Material strength: The material of the safety lock should meet the requirements of international standards, such as high-strength alloy steel or stainless steel, to ensure that it will not break under high loads.
Manufacturing process: Use advanced manufacturing processes such as precision forging and heat treatment to ensure the toughness and wear resistance of the material.
2. Design and Structure
Braking System: The braking system of the safety lock should be reasonably designed to quickly lock the chain after the heavy object is lifted to prevent sliding.
Guardian: The safety lock should be equipped with protective devices, such as anti-unhooking devices and self-locking devices, to ensure that it will not fail in unexpected situations.
3. Testing and Certification
Load test: Load test is carried out in accordance with international standards to ensure that the safety lock can work normally under the rated load.
Durability test: Long-term durability test is carried out to simulate the actual use environment to ensure the service life of the safety lock.
Third-party certification: Certification by an authoritative organization, such as ISO certification or CE certification, proves that the product meets international safety standards.
4. Use and Maintenance
Operation specification: Use the hand chain hoist strictly in accordance with the operating manual to avoid overloading or improper operation.
Regular inspection: Regularly check the braking performance and protective devices of the safety lock to ensure that they are in good condition.
Maintenance: Clean and lubricate the safety lock regularly to extend its service life.

5. Case Analysis
Case 1: Testing and Improvement of Safety Lock of Hand Chain Hoist in a Certain Enterprise
When using hand chain hoist, a certain enterprise found that the safety lock was prone to failure under high load. After testing, it was found that the material strength of the safety lock was insufficient. By replacing high-strength alloy steel and optimizing the manufacturing process, it finally passed the ISO 4307 certification and reached the international safety standard.
Case 2: Safety Accident and Improvement Measures of Hand Chain Hoist in a Certain Factory
A factory suffered a serious accident due to the failure of the safety lock of the hand chain hoist, which caused the heavy objects to fall. After investigation, it was found that the self-locking device of the safety lock was not designed reasonably. By redesigning the braking system and adding protective devices, the safety hazard was finally eliminated.

6. Conclusion
The performance of the safety lock of the hand chain hoist is directly related to the safety and reliability of the equipment. By selecting materials that meet international standards, optimizing the design, strict testing and standardized use, it can be ensured that the safety lock of the hand chain hoist meets international safety standards. Enterprises should attach importance to the quality control of safety locks and perform regular maintenance and inspections to ensure the safety of operators and equipment.