November 13, Anqing Petrochemical Electric Instrument Department employees have two pairs of normally open contacts explosion-proof button, cleverly modified Refining New District water pump start switch, add a new high-pressure equipment, new impetus.
There are totally 5 circulating water pumps in the Refining New District, of which 2 are steam turbine equipment and 3 1000kw high pressure units.In order to ensure the safe operation of the heat exchangers, pumps and pipes of all the devices in winter, the circulating water pump must The cooling water is delivered to each unit at full capacity to meet production needs.
At 16:30 on the same day, electrical equipment maintenance department electrical work area two workers Wei Zhuchun, Xu Wenbing received a call from the circulating water operator, high-pressure water pump P101 / E can not start. They immediately went to the site for maintenance work ticket, the first Check the high-voltage cabinet switch and field operation column, and then measure the continuity between the lines and found that the operating column switch has 'Li Gui.' They came to the scene, remove the explosion-proof operation column switch screw, explosion proof box within the self-reset universal switch Two pairs of normally open contacts have decayed, after lifting the operation of the cable, with a multimeter to measure, two pairs of points have been 'necrosis', can not heal .This kind of self-reset universal switch manufacturers have long been produced, can not find the same size of material Replacement, and the pump urgently boot, emergency repair is imperative.
As time goes by, the darkness has been strong.He immediately reported to the leadership, and actively use their brains, think of a way, decided to use two pairs of normally open contacts, but the shape of the Huarong explosion-proof pushbutton switch instead of the problem is in sight, Due to the size of the two switches can not be installed.And they do not rely on the use of the old operating column, the explosion-proof button rotary switch removed, the amount of good size, re-eye, and then screw the new rotary switch installed in the old operation At the same time, they also found that the ammeter on the old operating column dust transparent plate rupture, the operation of the cable has been severely discolored due to corrosion, the urgent need to deal with them to work hard, ran to the Treasury to find the same type of ammeter with waterproof rubber band Tightly set in the new ammeter, the new current embedded in the box, erase the green copper wire with sandpaper, the operating cable into the junction box, the rapid connection to restore the installation.
20:30 pm, as the operator presses the start button, turn the pump call to turn up, the successful completion of the rectification of the circulating water pump switch.
