Explosion-proof bridge type
This kind of crane is mainly used for lifting in explosive gas environments. Sevencrane ex-proof bridge crane wholesale basic structure is similar to that of ordinary bridge cranes, but explosion-proof measures are taken in mechanical parts such as motors, electrical parts and metal contact surfaces to ensure the safety of use in explosion-proof environments. . Explosion-proof bridge cranes can be divided into two types according to explosion-proof categories:
1. Top choice for industrial ex-proof bridge crane for coal mines:
It is mainly used in the upper part of the coal mine and the non-mining surface part of the mine. The crane should have a mining coal safety certificate (MA certification).
2. CE approved ex-proof bridge crane for sale for factory use:
It is mainly used in dangerous and important places with flammable gases or flammable mixtures. The crane should have an explosion-proof certificate issued by the National Testing Center.
Working environment and conditions
(1) The power supply of the crane is three-phase AC (three-phase four-wire system), the frequency is 50Hz/60Hz, and the voltage is ≤1000V (it can also be 3kV, 6kV or 10kV as needed). The voltage fluctuation of the power supply system at the connection point of the crane feeder should not exceed ±10% of the rated voltage.
(2) The track installation of the crane operation should comply with the GB/T level tolerance requirements.
The grounding resistance value of the crane running track should not be greater than 4Ω.
The altitude where the crane is installed and used does not exceed 1,000m (when it exceeds 1,000m, the capacity of the motor should be checked according to the provisions of GB 755, and when it exceeds 2,000m, the capacity of the electrical components should be checked).
(3) The radiant heat temperature of the crane hook part caused by the lifted items shall not exceed 300°C.
(4) Climatic conditions when the crane is working indoors:
The ambient temperature does not exceed +40℃, and the average temperature within 24 hours does not exceed +35℃;
The ambient temperature should not be lower than -5℃; the relative humidity should not exceed 50% at a temperature of +40℃.
(5) Climatic conditions when the crane is working outdoors:
The ambient temperature does not exceed +40°C, the average temperature within 24 hours does not exceed +35°C, and the ambient temperature is not lower than -20°C. The relative humidity is allowed to be temporarily as high as 100% when the ambient temperature does not exceed +25°C.
(6) The working wind pressure should not be greater than: 150Pa (equivalent to level 5 wind) inland, 250Pa (equivalent to level 6 wind) along the coast; the maximum wind pressure in non-working state: generally 800Pa (equivalent to level 10 wind), It can also be agreed separately.
A european standard ex-proof bridge crane suppliers that runs on an elevated track, also called a crane. The bridge frame of the bridge crane runs longitudinally along the tracks laid on the elevated bridges on both sides, and the lifting trolley runs transversely along the tracks laid on the bridge frame, forming a rectangular working range, so that the space under the bridge frame can be fully utilized to lift materials. Hindered by ground equipment. This kind of crane is widely used in indoor and outdoor warehouses, factories, docks and open-air storage yards.
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