In the process of chemical production, centrifuge accidents are not uncommon. Here, we wrote an accident "A sudden increase in centrifugal force caused the chemical centrifuge to disintegrate accidents" to see how the whole process happened.
The accident was mainly due to the fact that the centrifuge was often at a higher speed and had a sudden increase in speed due to the reason of the speed-regulating motor and the electric circuit; the disintegration of the centrifuge occurred.
Analysis of the reasons can get three points that lead to the cause of the accident.
* The speed indicated by the governor of the control motor does not match the actual speed. The actual speed of the centrifuge motor is higher than the speed indicated by the governor by about 20%, and the centrifugal machine increases the speed by more than 20%. The centrifugal speed of the centrifuge increases the centrifugal force of the centrifuge;
Second, the socket short circuit or open circuit ignition causes the speed of the speed regulating motor to suddenly increase, so that the centrifugal force of the centrifuge suddenly increases. Due to the above two reasons, during the operation of the centrifuge after work in the afternoon, the line is short-circuited or broken, the controller is out of control, the motor speed increases the speed of the centrifuge, and the centrifugal force increases exponentially. (Speed ​​is a factor that affects the centrifugal force.) The drum changes due to the breakage of the fastening bolt and the absence of the waistband (the weld). The outer edge of the drum changes from circular to cam and funnel, due to the high-speed rotation. The drum and the material both generate a large centrifugal force and also generate an upward force component, which causes the separation of the drum and the drum bottom, and damages the centrifuge cover and the limited circumference cover above the cover, thus One side flew off and broke the supporting foot on one side and flew away from the working platform. The flying part flew away from the side, and it also rotated itself, thus increasing the force and destructive force. , causing three people to be bruised on the spot.
Third, the buffer springs in the three pendulum rods (three-legged) supporting the rotating drum cannot be adjusted to stabilize the center of gravity due to severe corrosion, so that the centrifugal force is locally increased.
Through the above accident, we especially recommend readers to read the following article: "5 points of opinion through the analysis of centrifuge accidents" to reduce the occurrence of tragedy!
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