Safe use of electrical appliances
Outlet production line used in the main electrical equipment: motor (three-phase AC commutator
Motor, DC motor, tachogenerator, single-phase motor), controller (control transformer,
Regulator), instrument (tachometer, ammeter, temperature controller, thermocouple), electrical appliances
(Fuse, thermal relay, AC contactor, overcurrent relay, silicon rectifier, variable
Resistors, fixed resistance, transfer switch) and heater (frequency induction heater, resistance plus
Heaters) and so on.
In the extrusion line, the power source is the motor. The screw is moving through the motor.
Such as production and change, raw materials or varieties of transformation.
To achieve stepless speed regulation. At the start of the extruder, due to the low temperature of the plastic,
To prevent the nose pressure is too large, requiring the screw to start at a lower speed, and then to work
Speed flat rise. In the parking, in order to squeeze out the remaining material in the barrel, to protect the screw, to
In the production process, but also according to the technical requirements of the speed
Monitor the operating current of the motor so that it does not exceed the specified value. Pay attention to voltage changes at any time
Situation, electrical appliances can not be damp. Take the three-phase AC commutator motor as an example, the motor occurs below
Several cases should be immediately stopped:
0 motor or starter in the province of smoke fires;
O motor violent vibration, threatening the safe operation of the motor;
③ bearing more than the degree of tolerance to the degree of risk;
④ motor degree exceeds the rated value and the speed decreases;
⑤ inside the motor took place or swept the chamber.
Electric shock can be divided into electrical shock and electric burns according to the degree of injury. Both compared to electricity
The risk of injury is greater. In the extrusion production, the electric shock caused by the accident is as follows
(1) turn over electricity in the rainy season or summer, the weather is hot, the air is wet and the equipment is lowered
Of the insulation, easy to produce mud phenomenon. The weather is hot, the body sweat more
(2) equipment factors
① electric shock occurred in 1000
Low-voltage equipment, wide application, more opportunities for contact,
In "mainly due to equipment flawed, run unreasonable,
Into the e sigh
Protection equipment t is not perfect and so on
m electric shock accidents occur in people often contact the electrical connection parts.
, Joints and other parts of the connection is poor
Mainly due to
Touch the opportunity will be more than two
, Power distribution opportunities. Easy to come out of the array, the human body then
③ electric shock accidents occurred in the belt and mobile electrical equipment.
Mainly the demand for these devices often move, security equipment installed prone to array.
(3) seek operation of non-electric workers due to the lack of electrical safety knowledge and violation of the operation
Procedures and cause electric shock accident.
(') Management of security management, safety education is not enough. Security precautions are not complete
General, improper safety measures when power outages. Out of the production line, the main security power know
Know as follows.
① before driving.
Check the wire label insulation of the wire label device, if damaged
Leaf turn insulation must be good.
③ electric powder equipment is strictly prohibited live repair.
④ push pull electrical switch, the action should be fast, the face to avoid. Zen for the crab crab
Good protective tools.
⑤ not the performance of electrical appliances and electrical appliances are not familiar with the operator
⑥ Replace the burned bulb, fuse or other electrical accessories, you should first cut off the electricity
Bare and expensive by full-time electrician.
m motor deactivation time is too long, may be due to moisture Han, before driving should be used dry
⑧ occurred when the electric shock, the first should immediately cut off the electric or timely electric shock and electricity
"But not directly by hand to pull. Do not use metal or moistened objects to work it,
So as to avoid electric shock. If the electric shocker has stopped breathing, it must be done immediately artificial respiration wells
Ask the doctor first aid.
Safe use of electrical appliances