The crane in paper pulp mill is mainly used for lifting paper machine equipment and paper reel spool.  Wet end crane or dry end cranes are very heavy duty EOT cranes in paper mills.

The working environment of paper pulp mill crane is relatively harsh, such as high temperature, high humidity, paper scraps in the air, etc. Therefore, the crane must be able to adapt to the harsh working environment and high-intensity paper mill operation. So selecting the right paper pulp mill cranes manufacturer can not only reduce the initial crane investment and plant construction costs, but also reduce crane operation costs and maintenance costs, reduce paper machine downtime losses, improve enterprise efficiency and enhance enterprise competitive advantage.

There are two trolleys are travelling on the crane girders. The work duty of this dry end crane is FEM 2m, FEM 3m or FEM 4m. The standard capacity is from 16ton, 18ton, 20ton to 100Ton+16ton, 18ton, 20ton to 100Ton. The dry end crane duty is transferring paper rolls from one side to other side in the workshop. This crane also called paper rolls handling cranes.

What are the requirements for the wiring of tire gantry cranes? The following is the knowledge I share with you, I hope it can help you.

1. The tire gantry crane includes components of metal structure and electromechanical equipment. Some detachable cables are based on nitrile PVC flat flexible cables. Rubber sheathed flat flexible cable. Generally speaking, the cables of tire gantry cranes can be laid directly, and only need to take appropriate protective measures to avoid mechanical damage, chemical corrosion and oil pollution; but it should be noted that no joints are allowed in the middle of the crane wires; if the path allows, Transition terminals can be connected near the device.

2. The wires of the tire gantry crane must be installed and connected correctly in order to connect the various components, which plays an important role in the development of the lifting operation. In addition, the relevant laying must meet the above requirements, otherwise it will affect the normal operation of the double-girder road and bridge gantry crane.

3. The inner cavity of the junction box (box) should have sufficient wiring space. Terminal blocks with anti-loosening measures should be used. Wires passing through steel pipes or metal holes must be guarded to prevent wire fraying. Conduit or conduit should be as close as possible to electrical equipment, and wires that people may come into contact with must be routed in conduit or metal conduit.

4. Both ends of the wire should use cold-pressed copper ends that will not fall off. The connection between the wire and the end must be compressed with a special cold-pressing pliers. Both ends of the wire should be consistent with the circuit diagram or wiring diagram. Intermediate connectors are not allowed for all wires, and transition terminals are allowed near equipment for lighting wires. in the wire slot. In places where wires are piled up, such as under the driver’s cab floor, the wires should be arranged, and the wire harness number consistent with the wiring diagram should be marked. In summary, the above is the knowledge shared by the tire gantry crane manufacturers and everyone, I hope it can help you!

gantry crane is a kind of lifting equipment with high technical content and complicated operation. Usually, after the gantries crane equipment is idle or installed, no-load test is required before it is put into use, mainly to check whether the quality of the equipment meets the safety requirements. construction requirements.

During the no-load test of the gantry cranes, the following points should be paid attention to:

1. Pay attention to whether the current, voltage, etc. meet the requirements.

2. Test whether the limiter is in good condition and whether the phase-misalignment protection function is good.

3. Test whether the assembly quality of the rope device is good. When the wire rope is in a tight state, start the hoisting mechanism of the gantry crane to make the hook lower. After turning the drum twice, the wire rope should be able to be discharged from the rope guide mouth smoothly.

4. Check the axial movement of the conical motor shaft, and use visual inspection to judge the axial movement during operation to determine whether the movement is within the allowable range. If it does not meet the clearance, it should be adjusted in time.

The no-load test of the gantry cranes are to check whether each operating mechanism is normal and whether there is any abnormal sound. After confirming that it is normal, the heavy-load test is carried out, and then it can be officially put into use after being accepted by the quality inspection department.

The gantry crane is a large-scale loading and unloading equipment that is widely used outside the garage. It is widely used in outdoor freight yards, stock yards and other occasions. Because the gantries crane is used outdoors, it will be greatly affected by environmental factors. One of the important The item is the anti-rust work of the gantry crane. So how to prevent rust of gantry cranes used outdoors?

1. When operating the Gantry cranes, avoid the collision between the equipment and other objects, so as to prevent the anti-corrosion layer on the surface of the metal structure from falling off. Rust occurs because bare metal is oxidized in contact with air. Therefore, during the use of the gantry cranes, it is necessary to frequently check whether the appearance of the crane is complete, and the damage should be repaired in time.

2. The movable parts of the gantries crane should be checked regularly to avoid the lack of lubricating oil caused by rain erosion and damage to the equipment.

3. For the gantry crane that is not used for a long time, it is necessary to protect it:

1) The movable parts are painted with -10 or -20 diesel, which can not only clean off the substances that are easy to corrode the equipment, but also form an oil film on the metal surface, which is beneficial to protect the mechanical equipment.

2) For the connecting parts of the cranes, due to long-term use, it is easy to have paint defects, so diesel oil should be used for painting to avoid corrosion.

During the daily inspection of the Gantry Crane, if it is found that the paint film with the metal structure is damaged, the damaged position must be cleaned, and then painted with paint that can prevent rusting. This ensures that the surface of the metal will not corrode in rainy and snowy weather.

Doing a good job in the anti-rust work of the gantry cranes can reduce the damage of various parts of the crane and prolong the service life of the machine.

Explosion-proof crane is mainly used for key equipment for unloading, installation, debugging, docking. And other operations in places with explosive gas or explosive dust environment requirements. The crane has a complex structure, harsh operating environment and difficult maintenance. The braking device is a key component of the equipment and is reliable. Performance is directly related to the safety of hoisting operations.

Explosion-proof crane is a complete set of electromechanical equipment. It usually composed of metal structures, explosion-proof electrical equipment, connections between explosion-proof electrical equipment, mechanical or hydraulic transmission devices, mechanisms and parts, and safety devices. Generally, the explosion-proof function of a single explosion-proof electrical equipment is mainly to prevent electrical sparks, static sparks and high temperatures of electrical enclosures. The explosion-proof crane has explosion-proof function in the process of transforming powerful electrical energy into mechanical energy to carry heavy objects. It not only prevents electric sparks, static sparks, and high temperature of electrical appliances. But also prevents impact friction sparks and high temperature on the surface of mechanical equipment.

The explosion-proof principle of explosion-proof cranes is to take corresponding measures to control the generation of sparks. That is, use corresponding explosion-proof technology to control and eliminate electric sparks and mechanical sparks. So that they cannot catch fire, explosive gas mixtures and environmental areas. Combustible dust and mechanical sparks are made of special non-sparking materials in parts that are prone to dangerous sparks to control the content of magnesium and titanium in the light alloy shell. So as to avoid collision and friction between relatively moving mechanical parts, thereby achieving explosion-proof , Known as mechanical explosion-proof technology.

Explosion-proof crane trolleys and carts as well as lifting motors, electrical control cabinets, main power switches, electromagnetic brake coils or hydraulic drive motors, etc..It usually use explosion-proof electrical equipment and cable wiring, junction boxes, junction boxes, power switches, control and emergency. Generally, electrical equipment with higher safety is used, such as a stop switch.

For non-intrinsically safe wiring on explosion-proof cranes. Rubber sheathed round cables and compression nut-type lead-in devices are usually used to prevent pulling out and reliable sealing. And no joints are allowed in the middle of the cable. If necessary, an explosion-proof junction box should be installed. Such as power circuit, control circuit, lighting circuit and audio signal circuit, etc.