erecting crane for railway bridge span

Railway bridge erecting machine is a bridge construction machinery used on railways to construct small span beams across the entire span.Railway bridge erecting machine is an important mechanical equipment in railway construction, which greatly improves construction efficiency, reduces the workload of operators, and increases the overall revenue of railway engineering.Most railway bridge erecting machines are prefabricated in the beam yard near the bridge, and then transported to the bridge site by large beam transport vehicles. The bridge crane is then lifted onto the bridge by the large bridge erecting machine.

Safety regulations for railway bridge erecting machines

1. When working at a distance of more than 3 meters from the ground, workers should wear safety belts made of tough materials such as cowhide and canvas,Attach a sturdy rope (diameter not less than 25mm) with a length not exceeding 3m, and load an object of 250k8 before use for 15 minutesStatic load test or impact test with a 100kg object at a height of 3m.

2. Hemp rope can only be used for manually pulling (through pulleys) and lifting relatively heavy loads, and cannot be used for lifting ropes in mobile mechanisms.

3. Long steel wire ropes shall not be arbitrarily shortened, and lifting steel wire ropes shall not be extended for use. However, in special circumstances, their extension shall not pass through pulleys or pulleysThe drum must undergo trial lifting and be inspected to confirm safety before it can be officially lifted.

4. When lifting heavy objects, when the object is moving on top of other objects, the lifted object must be at least 50cm higher than other objectsexceed.

5. When the crane is used for lifting operations near high-voltage power lines, a certain distance must be maintained. If the line voltage is below 20 kV, it should be lifted by the boomThe vertical and horizontal distances between the vertex and the transmission line shall not be less than about 3m. If the line voltage is still high, the safety distance needs to be increasedLarge, while setting up security personnel for observation. If necessary, a power outage operation must also be applied for.

6. When lifting objects with a crane, the wire rope of the hook should be kept vertical. If the crane is far away from the heavy object, the inclined hook is used to lift it, forming a diagonalHanging is extremely dangerous and should be prohibited. Slanting not only causes heavy objects to sway or collide with other objects, but can also lead to rollover accidents in severe cases.

7. It is strictly prohibited to stand under the lifted object.

8. Lifting operations must be directed by a designated person with clear signals, and contact must be made with the driver.

9. It is prohibited to carry out lifting operations at night without sufficient lighting, heavy rain, snow, fog, and winds above level 6.

Maintenance and upkeep of railway bridge erecting machines

1、 Routine maintenance: (performed before, after, and during work)

1. Regularly clean the dust and oil stains in the driver's cab and on the aircraft body, keeping them as clean as possibleCleaning inside and outside the machine room;

2. Check if the brake clearance is appropriate;

3. Check if the keys and connecting bolts on the coupling are tightened;

4. Check whether each safety device is sensitive and reliable;

5. Check the wear of the brake band and steel wire rope;

6. Check if the contacts of the controller are tightly adhered and matched;

2、 First level maintenance (conducted once a month)

1. Add lubricating grease to the rolling bearings;

2. Check the insulation condition of all electrical equipment;

3. Are the control screen, protection panel, controller, resistor, and various wiring sockets and nuts tightened;

4. Check the oil level of the reducer, the oil level and lubrication condition of the brake hydraulic solenoid. When the oil level is insufficient, lubricating oil and grease should be added.

3、 Secondary maintenance (quarterly or semi annual)

1. Add oil to the rolling bearings;

2. Check the insulation condition of all electrical equipment; .

3. Are the control screen, protection panel, controller, resistors, and various wiring sockets and nuts securely fastened.

4、 Long term maintenance (regularly carried out by technicians and dedicated maintenance personnel)

1. To maintain the geometric shape of the metal structure in accordance with the technical specifications, it is required to conduct an annual inspection of the deflection of the main beam;

2. Check the welding seams and bolt connections of the gantry, upper and lower crossbeams, support legs, trolley frame, lifting equipment, etc.

3. An annual paint inspection should be conducted, and the area of paint peeling should not exceed 10% of the total area; Under normal circumstances, repainting, decoration, and anti-corrosion should be done every 2-3 years;