How much do you know about the maintenance method of the centrifuge?
August 13, 2021
How much do you know about the maintenance method of the centrifuge?
Even if a centrifuge is good and not properly maintained, its service life will not be long, and the centrifugal effect will not be good. For example, it will reduce the service life of the centrifuge and cause safety accidents. So how much do you know about centrifuge maintenance methods? Let's take a look with Haiying Wuzhou.
Centrifuge is an indispensable important equipment in the current life chemistry subject research center. How to ensure the reliable operation of the equipment and achieve all its effects is a key issue that the experimenters pay attention to.
According to the traditional concept, the problem of the centrifuge is caused by the imbalance of the rotor volume, and the weighing deviation of the sample, the overflow of the centrifuged sample liquid during the centrifugation step and the rotor erosion are the key reasons for the imbalance of the rotor. Analyzing various security incidents, the key reasons are the following:
1. When the centrifuge tube is balanced, the unbalance of the centrifuge tube placed symmetrically is greater than 0.1 ~ 1g because the balance is used all the year round and cannot be corrected.
2. When the centrifuge tube is loaded with samples, because the sample liquid bundle is filled or the centrifuge tube cap cannot be twisted tightly, the high vacuum in the centrifuge chamber during the centrifugation step causes the centrifuge tube to flatten, split, and overflow the sample liquid, resulting in The rotor is unbalanced and the shaft is bent or broken.
3. Because the proportion of the original sample is not equal to the proportion of the balance liquid, the rotor dynamic balance is unbalanced and a safety accident occurs.
4. When a horizontal rotor is used, the number of the bucket and the number of the core of the horizontal rotor are not carefully installed, which will interfere with the dynamic balance of the rotor.
5. The mixed use of aluminum alloy centrifuge tube caps and stainless steel centrifuge tube caps (different proportions between the two) may cause safety accidents.
6. The improper use of the rubber sealing ring in the centrifuge tube cap and the rubber sealing ring of the rotor cover and the unreasonable sterilization and disinfection, such as internal cracking and solid high temperature disinfection (drying in a drying oven) throughout the year, etc., aging, cracking, loss of airtight function, etc., The sample overflows during high-speed operation, so the rotor is operated in an unbalanced state.
7. For centrifugal tubes of various materials, it is impossible to better grasp the area and disinfection method of centrifugal tubes specified by the manufacturer before adopting them. Chemical solutions and improper disinfection water are used to solve the problem, which causes the centrifugal tubes to swell and crack during operation. And there was a safety incident.
8. Due to negligence in work, the rotor cover could not be tightened or the rotor cover and the rotor handle were exchanged, which caused the screw locks to not fit. When the machine was started, the rotor cover flew out and a serious shaft broken safety accident occurred.
9. The centrifuge tube is aging or the centrifuge tube of the high-speed centrifuge is used in the ultracentrifuge, so that the centrifuge tube is cracked during operation, the sample liquid overflows and the balance is lost, and the shaft is deformed.
10. Due to improper service life control and various types of corrosion, the rotor exploded during operation.
11. Due to various reasons, the fixing parts of the driver or other programs were not removed during assembly, and the equipment was forced to test operation, which caused the broken shaft and the rotor to explode.
12. The materials such as the rotating shaft and the rotor have internal injuries, or the detection and product quality problems during production are also a key reason for the equipment to cause safety accidents.