Test method of hand chain hoist safety lock

Test method of hand chain hoist safety lock
In the fields of industrial production, construction, logistics and transportation, hand chain hoists, as a common lifting equipment, play an indispensable role. However, the safety of hand chain hoists is directly related to the life safety of operators and the normal operation of equipment. Among them, the safety lock is a key component of the hand chain hoist, and its performance is crucial. Therefore, mastering the test method of hand chain hoist safety lock is of great significance to ensure the safe operation of equipment. This article will introduce in detail the various test methods of hand chain hoist safety lock to help readers fully understand its test process and key points.

1. Appearance inspection
Appearance inspection is the first and basic step in the test of hand chain hoist safety lock. Through appearance inspection, it can be preliminarily judged whether there is obvious damage or defect in the safety lock. The specific inspection contents include:
Shell inspection: Check whether the safety lock shell is damaged, deformed, cracked, etc. The integrity of the shell is the premise for ensuring the normal operation of the safety lock. Any damage may cause the safety lock to fail during use.
Fixed parts inspection: Check whether all fixed parts are complete to ensure that there is no looseness or missing. The firmness of the fixings directly affects the stability of the safety lock. Loose or missing fixings may cause the safety lock to shift or fall off during operation.
Label inspection: Check whether the label of the safety lock is clear and visible, including the rated load, manufacturer information, instructions for use, etc. Clear labels help operators use the equipment correctly and avoid safety accidents caused by misoperation.

2. Operation performance test
The operation performance test mainly checks the flexibility and reliability of the safety lock in actual operation. Specific test methods include:
No-load test: Operate the hand chain hoist without load to check whether the safety lock can work properly. Observe the reaction speed and sensitivity of the safety lock when pulling the handle to ensure that it can respond quickly and work normally without load.
Load test: Carry out a load test according to the rated load provided by the manufacturer. Lift the hand chain hoist to the rated load and observe whether the safety lock can be locked normally. Load test is a key step in testing the performance of the safety lock, which can effectively verify the reliability of the safety lock in actual work.
Repeated operation test: Perform multiple repeated operations to simulate frequent operation scenarios in actual use. Check whether the safety lock is fatigued, worn or stuck after multiple operations. Repeated operation tests can help to find problems that may occur in the long-term use of the safety lock.

3. Braking performance test
Braking performance is one of the core functions of the hand chain hoist safety lock. Its main function is to quickly lock the load when the equipment stops working to prevent the load from accidentally slipping. The specific methods of braking performance test include:
Static braking test: Under load, suddenly stop the operating handle to check whether the safety lock can quickly lock the load. The static braking test mainly verifies the braking effect of the safety lock when it stops suddenly to ensure that it can effectively lock the load in a short time.
Dynamic braking test: During the process of lifting or lowering the load, suddenly stop the operating handle to check whether the safety lock can quickly lock the load. The dynamic braking test simulates the emergency braking situation that may occur in actual use, and can effectively test the braking performance of the safety lock under dynamic conditions.
Braking distance test: Measure the distance the load slides after braking. The shorter the braking distance, the better the braking performance of the safety lock. Through the braking distance test, the braking effect of the safety lock can be quantitatively evaluated.

4. Durability test
Durability test is an important means to evaluate the long-term performance of the hand chain hoist safety lock. Through durability test, fatigue, wear and other problems that may occur in the long-term use of the safety lock can be found. Specific test methods include:
Cyclic operation test: Perform multiple cyclic operations to simulate the long-term operation scenario in actual use. Record the performance changes of the safety lock during the cyclic operation process to observe whether it is fatigued, worn or stuck.
Wear test: Observe the wear of each component of the safety lock through long-term use. Wear test helps to evaluate the service life and maintenance cycle of the safety lock.
Fatigue test: Repeated loading and unloading operations are performed on the safety lock to simulate fatigue conditions in actual use. Fatigue test can find problems such as fatigue cracks that may occur in the safety lock during long-term use.

5. Environmental adaptability test
Hand chain hoists may be affected by factors such as temperature, humidity, and corrosive gases in different use environments. Therefore, environmental adaptability test is of great significance for evaluating the performance of safety locks under different environmental conditions. Specific test methods include:
High temperature test: Place the hand chain hoist in a high temperature environment to simulate the high temperature scenario that may be encountered in actual use. Check the performance changes of the safety lock under high temperature conditions and observe whether it has problems such as deformation and jamming.
Low temperature test: Place the hand chain hoist in a low temperature environment to simulate the low temperature scenes that may be encountered in actual use. Check the performance changes of the safety lock under low temperature conditions and observe whether it has problems such as brittleness and jamming.
Humidity test: Place the hand chain hoist in a high humidity environment to simulate the humid scenes that may be encountered in actual use. Check the performance changes of the safety lock under high humidity conditions and observe whether it has problems such as rust and jamming.
Corrosive gas test: Place the hand chain hoist in an environment containing corrosive gas to simulate the corrosive scenes that may be encountered in actual use. Check the performance changes of the safety lock in a corrosive gas environment and observe whether it has corrosion