Koepe winder Model: JKM-3.5*4 tower-mounted hoist ( Diameter:3500mm, 4 ropes)

Hoist manufacturer: ABB company

Mine: Gold Mine

The friction pulley lining installed in May 2017, as of April 15, 2011. The deepest rope groove is 60.3mm, see the table below for details (measured on April 4th)

According to metal non-metal safety regulations: If the depth of the friction lining is worn by 2/3, replace the friction lining with a new one. At the same time, the ABB product manual points out that the remaining 25mm of the friction hoist insert thickness should be replaced. The old friction lining material is GDM326, and the newly installed friction lining material will be GDM326. The lining interface is as follows: According to statistics, the fastest wear rate is 6mm/month.

1、 Preparation before replacement

1. Liner handling

All 600 spare friction lining are stored on the roof of the operation room on the 10th floor of the well tower and transported to the south side of the drum on the 10th floor in advance. When replacing, it shall be delivered to the maintenance platform one after another.

2. Preparation of tools, instruments and materials

1 set of rubber wrench, 2 sets of M20, 2 sets of rubber wrench, 2 sets of M20, 2 sets of rubber wrench, 2 sets of M20, 2 sets of rubber wrench, 2 sets of bolt, 2 sets of M20, 2 sets of rubber wrench, 2 sets of rubber wrench, 2 sets of rubber wrench, 2 sets of rubber wrench, 2 sets of rubber wrench, 2 sets of bolt, 2 sets of 8 #, 2 sets of rubber wrench, 2 sets of rubber wrench, 2 sets of rubber wrench, 2 sets of 8 # and 2 sets of rubber wrench, There are 1 flat saw, 2 sets of caliper, 1 flat scraper, 2 sets of internal polishing machines, 1 set of steel wire, 2 sets of callipers, 1 set of callipers and 1 set of steel wire.

3. Sealing of rope outlet hole on the 9th floor of well tower

In order to prevent bolts, gaskets, pads and other small parts from falling, losing and damaging wellbore equipment, the rope outlet hole shall be closed in advance. Transport the wood boards and other materials used to build the platform to the 10th floor of the well tower in advance.

4. Maintenance lighting preparation

36V maintenance lighting shall be installed on the maintenance platform on the 9th floor, and 220V power supply shall be prepared at the same time.

5. Staffing

Each shift: 4 people deliver gaskets, 4 people replace gaskets, 6 people loosen and fasten bolts, a total of 14 people.

2、 Replacement scheme

This maintenance scheme is carried out without rope falling off. The specific replacement scheme is as follows:

1. After the preparation before replacement, stop the north and South skip at the same elevation in the middle of the shaft, and electrically adjust the hoist to the minimum speed of 0.15m/s

2. On the 9th floor turning tool platform, the platform guardrail is used to build the maintenance platform, the gap of the platform is closed with woven bags, the guardrails on both sides of the turning tool platform are closed with cotton curtain, and the whole platform is closed around.

3. Start to remove the fixing bolts of the wedge-shaped locking block (the straight locking block does not move), remove the locking block, remove the old friction pad, clean the rust on the drum surface with a steel wire brush and flat shovel, and install a new friction pad. Install a new gasket after removing 2-3 locking blocks at the same level. Before removing the locking block, number the locking block and install it according to the number during installation. Knock the gasket with a rubber hammer and iron hammer to make sure that there is no gap between the gasket and the gasket and before the gasket and the drum. When knocking the gasket, pay attention not to use too much force to cause the deformation of the gasket. Every 20 gaskets are installed, mark the gasket along the direction of the drum shaft and observe whether the gasket moves.

At the joint of the old and new pads, add rubber blocks and cotton cloth processed in advance before the old and new pads, jack up the lifting steel wire rope (nail the rubber block on the old pad with nails, and pad cotton cloth on the rubber block) to protect the new pad. The preload of the fixing bolt of the conical locking block with the new gasket is 210n m. The rotation direction of the drum is counterclockwise (South dipper down, North dipper up). When the gasket is replaced to the last one in each circle, measure the gap size with caliper and internal caliper, cut off the excess gasket, and punch in the gasket with hammer cushion leather.

4. After the liner is replaced, adjust the South skip to unload the straight rail and adjust the straight rail limit switch. Adjust the diameter of the drum electrically. First run it for 2-3 times without load, and then heavy load it for 2-3 times. Tighten the fixing bolts of all locking blocks with a tightening torque of 300N m.

5. Turn the rope groove (alignment and rounding), and press and adjust the steel wire rope.

3、 Maintenance time

It takes 48 hours to build the maintenance platform, replace the gasket and fastening, adjust the straight rail, turn the rope groove and pressurize.

4、 Maintenance safety precautions

1. All inspection personnel shall carefully study the maintenance scheme before maintenance;

2. Workers working at heights must fasten their safety belts;

3. During the motor train, the personnel in the drum must withdraw from the drum and contact the operators on the 9th floor for confirmation before the motor train.

4. After the maintenance, the built maintenance platform must be removed in time, and the removed flashing must be restored in time.