Electric hoist gantry crane operation test

One, running test
(A), pre-trial preparation and examination:
1, close all current, according to the paper size and technical requirements check all connections are securely fixed to pieces, each actuator assembly is accurate and flexible, metal structure without deformation, wire rope electric hoist winding on the situation.
2, check the installation of the  bridge crane  erection requirements to install, set up the relevant provisions.
3, the electrical equipment must be carried out after the completion of the following tasks test.
(1) Check the circuit with Megaohmmeter system and all electrical equipment insulation resistance.
(2) Disconnect the power circuit in the case of testing the accuracy of control lines, and all the rotating parts operating apparatus is flexible and reliable (if necessary lubrication).
(3) Electrical equipment should be working properly, which must pay special attention to the electromagnet, limit switches, safety switches and emergency switches operational reliability.
 (Two), no load test:
1, the external inspection and hand rotating  gantry crane  bodies, everything is normal no-load test.
2, according to the following procedure test carts, electric hoist agencies.
(1) before starting the motor to run slowly several times the crane, and then to run at normal speed, when all parts of the body should be smooth work, no vibration, shock, and so on.
(2) along the stroke length of several trips to check the operation of carts and electric hoist structure.
(3) under no load at the end of each test switches.
(Three), load test:
No load test conditions are normal only after allowing for load test. Load test of static and dynamic two kinds, the first for the static load test, and then the dynamic load test.
1, the load test test content.
(1) Metal construction crane at the bolted connections and welding quality, mainly primary end beam quality of the connection.
(2) machinery and equipment, metal structures and spreader strength and rigidity as well as the strength of the  bridge gantry crane  rails.
(3) brake action should be flexible and reliable work.
(4) No noise reducer.
(5) good lubricity lubrication parts, the bearing temperature rise does not exceed specified.
(6) The mechanism parts should be smooth, no vibration phenomenon, if any defects, deficiencies should be repaired and then tested.
2, static load test, electric hoist lifting rated load.
Running back and forth the entire length of the bridge after several electric hoist will be open to the bridge at one end, in the amount column to find the zero line (ie, the actual height of the beam at this time).
Measured stiffness: the electric hoist bridge open to the middle with a crane hook lifting rated load, leaving the ground 100 ~ 200mm, suspended for 10 minutes, this time measuring bridge girders or lower deflection, A5 grade crane girder deflection under should not exceed L/700.
Rated load test after passing for 25% of the rated load test, overload test method and rated load test the same eligibility conditions that no permanent deformation after the test, trial can be connected for three times. The results of a third subject.
3, dynamic load test.
(1) Static load test conditions are normal only after allowing for dynamic load test, dynamic load test as the date of acceptance of the conditions are not.
(2) dynamic load test is a constant load in excess of 10% case of repeated lifting and falling commissioning and operation of institutions in this load of perishable commissioning and for carts, electric hoist running terminal switch test.
4, the electrical component testing regulations and inspection items:
(1) Cranes agencies for continuous repeated operation less than 15 minutes. Therefore, the test agencies operate alternately. Only when the body is completely stopped before allowing reverse.
(2) Check the limit, safety devices, interlocks action is correct and reliable.
(3) failure of the electrical equipment operation, should be eliminated, not motors and electrical equipment exceeds a predetermined standard temperature, the movable contact may not have burning conditions, the device should not abnormal sound and vibration phenomena.