RU2409513C1 - Method of replacement of ropes of mine winding plant with friction pulley, and device for its implementation - Google Patents

Abstract

FIELD: mining.

SUBSTANCE: method involves installation of lifting vessels to installation bridges, fixture of replaceable ropes in pile drive, removal of friction pulley of the winding plant from ropes, and erection of special flexible shell. Then, to the friction pulley there attached is hanging and replaceable ropes, and they are simultaneously wound from transport coil and from shaft. After that hanging rope is supplied to the shaft and at the same time the replaceable rope is wound to the well surface. Hanging rope is fixed in pile drive with support supporting clamp above which the section of rope, which is enough for its driving through friction pulley and for being attached to upper lifting vessel, is left. Lower end of hanging rope is fixed in towing hook of lower lifting vessel. The rest ropes are replaced in the same way. Then special flexible shell is removed, the left sections of hanging ropes are arranged on friction pulley, their ends are fixed in towing hooks of upper lifting vessel, and supporting clamps are removed and installation bridges are removed. In order to implement the method, there used is friction pulley of winding plant, which is prepared for arrangement of ropes by installation of special shell on it, which divides friction pulley of winding plant into two capacities for rope winding and excludes removal/installation operations from friction pulley surface of lining and its attachment elements.

EFFECT: increasing manufacturability and improving reliability of replacement methods of ropes.

2 cl, 10 dwg

Description

The invention relates to the mining industry, and in particular to methods and devices for changing and hanging ropes of mine hoisting installations.

There is a method of hitching and changing lifting and balancing ropes and vessels of multi-rope hoisting installations [1], according to which hitching and changing of ropes is carried out by attaching their ends in pairs to opposite flange pulley flanges with simultaneous winding on the traction sheave of the lifting machine. At the same time, two ropes are synchronously coiled up to the middle of the friction pulley. Then the direction of the winding changes. At the end of the winding of the hanging ropes on the friction pulley of the lifting unit, the lifting vessel is lowered onto them. In this case, the device for implementing the method is a container located on the main shaft of the lifting machine, which directly uses the traction sheave of the lifting machine.

The disadvantages of this method and the device with which it is implemented are:

- the complexity of the method on deep climbs, where to accommodate the entire length of the ropes will require a significant capacity of the traction sheave;

- the need to create a significant torque drive of the lifting installation, since the multi-rope machine is practically translated into single-end lifting mode;

- the formation in the hanging ropes when lowering the lifting vessel along the trunk under the influence of its own weight and the mass of the lifting vessel of the deformations associated with its multilayer winding on the traction sheave;

- the creation of additional torques in the hanging ropes due to their rigid attachment to the flanges of the friction pulley and the lifting vessel.

- the probability of cutting through the ropes of the lower turns being wound from the traction sheave into the trunk on the traction sheave due to the attachment of a lifting vessel to the ropes.

The closest in the set of essential features and the achieved positive effect to the claimed method is a method of replacing ropes in a shaft lifting installation with a friction pulley [2], according to which the lifting vessels are installed at the receiving platforms on the overlap of the trunk and the copra. The friction pulley of the lifting unit is freed from the lifting ropes and the mounting rope is fixed on it. With the help of clamps, the replaceable balancing rope in the copra is held on the landing bridge. The balancing rope is disconnected from the lifting vessels and its upper end is attached by means of connecting clamps to the mounting rope. Further, by rotating the friction drive pulley with a lifting machine, the replaceable rope is lifted, the clamps holding it on the landing bridge are dismantled, the replaceable rope is wound from the barrel onto the drive pulley. Then, by rotating in the opposite direction, the replaceable rope from the friction pulley is wound onto the mine site and disconnected from the assembly rope. An attached rope is connected to the mounting rope by connecting clamps and is wound onto a friction drive pulley, from where it is lowered into the barrel by rotation in the opposite direction. On the landing bridge, clamps are mounted on the hanging cable and it is disconnected from the mounting cable. The ends of the hanging rope are brought under the lifting vessels.

A device for implementing this method is a friction pulley of a lifting installation, which contains a welded pulley connected to the hubs mounted on the shaft, with a shell lined with trapezoidal plastic compounds.

The main disadvantages of this method and the device with which it is carried out are:

- the need for an additional installation cable;

- the development of special devices for attaching the mounting rope to the pulley of a multi-rope lifting installation and the mounting rope to replaceable and hanging ropes;

- the complexity of the method when replacing flat balancing ropes due to the design features of this type of ropes, determining the order of their winding under load;

- the presence of significant deviation angles on the guide pulleys due to the use of the entire width of the friction pulley to accommodate the rope, which increases the risk of damage to the outer surface of the rope;

- separation in time of the processes of issuing a removable rope and lowering the hanging rope in the trunk, which significantly lengthens the replacement process;

- significant time spent on releasing the friction pulley of the lifting unit from the hoisting ropes and placing them on the friction pulley after the replacement;

- the risk of damage to the ropes when they are wound on an uneven surface of the friction pulley, consisting of a lining, a unified fastening of the lining in the form of segments and pressure bolts,

- the difficulty of adjusting the drive of the lifting machine when winding the hanging rope on the friction pulley due to the small load of the drive.

In connection with the general direction in the mining industry to increase mining depths and, as a result, to a more rational use of the capabilities of hoisting installations, there is a need to develop optimal methods for replacing ropes, which can significantly save time for work on their replacement.

The objective of the invention is to reduce the time required to replace the ropes of a mine lifting installation by combining the winding and winding of the ropes and eliminating their mechanical damage and local wear by reducing the dynamic effects of the friction pulley on the ropes, due to the increased comfort of controlling the electric drive and reducing the deviation angle on the rails pulleys.

The technical result of the proposed method is achieved due to the fact that the method of replacing the ropes of a mine lifting installation with a friction pulley includes disconnecting vessels fixed on the horizon from the head ropes, issuing replaceable ropes to the surface by unwinding them on the friction pulley and winding from the friction pulley to the shaft surface, winding the suspended rope from the surface of the shaft to the friction pulley, the supply of the suspended cables to the shaft of the shaft and their subsequent connection to the lifting vessels. According to the invention, the ends of the replaceable and hanging ropes are attached simultaneously to one friction pulley, during rotation of which the hanging rope is simultaneously wound from the shaft surface and the replaceable rope from the barrel onto the friction pulley, followed by the hanging rope to be fed into the barrel and the replaceable rope being wound from the friction pulley onto the shaft surface .

A device for implementing a method for replacing ropes of a mine hoist with a friction pulley includes a welded pulley with hubs mounted on the shaft, with a shell lined with plastic bars. According to the invention, a special flexible shell with transverse plates attached to it with a step that is a multiple of the distance between the rows of holes in the friction pulley for mounting wedge-shaped segments is attached to the outer surface of the friction pulley, dividers are attached to the plates, placed across the plates perpendicular to their surface in the middle of the special shell oriented outward from the surface of the friction pulley.

The technical effect of the claimed invention consists of reducing the dynamic component of the impact of the friction pulley on the ropes by increasing the comfort of controlling the electric drive, since there are practically no zero current modes due to the constant presence of the load on the pulley from the ropes being pulled from the barrel or fed into the barrel and reducing the forces of interaction of the turns the rope with each other during winding and winding by reducing the deviation angle on the guide pulleys due to the installation of a special flexible th shell.

According to the claimed method of replacing the ropes of a mine lifting installation with a friction pulley (see Fig. 1), a lifting vessel 1 of a mine lifting installation with a friction pulley 2 is set at the lower receiving platform on the mounting bridge 3.

The rotation of the friction pulley of the lifting installation towards the lower lifting vessel 1 is the weakening of the lower sections 4 of the replaced ropes 5 over the trailed devices 6.

From the side of the lifting vessel 1, on the replaced ropes in the pile, support clamps 7 are installed on the mounting bridge 8.

Using a crane 9 and slings 10, the lifting vessel 11 is lifted (see figure 2) to weaken sections 12 of the replaced ropes above the support clamps and trailing devices 13.

Mounting bridge is mounted 14. A lifting vessel 11 is mounted on it with a crane.

Replaceable ropes (see Fig. 3) are alternately dismantled from the trailing devices 13, removed from the friction pulley and laid next to it in the coils 15. One plastic block 16 is removed from the friction pulley and through the hole 17 in the pulley under a removed bar with one of the previously exposed in the copra transport coils 18, the end 19 of the hanging rope 20 is fed into the friction pulley. A special flexible shell 21 is mounted on the friction pulley so that the end of the hanging rope is located in zone 22 and is attached to the shaft 23 of the friction pulley by clamps 24.

The second block of plastic compound 25 is removed from the friction pulley and through the hole in the pulley 26 the end 27 of one of the replaced ropes is fed through the pulley 28 onto the friction pulley 2 with a flexible shell in the zone 29 to accommodate the replaced rope and fastened with clamps to the shaft of the friction pulley in the same way as a hanging rope.

The end 30 of the replaceable rope is dismantled from the towing device 31 of the lifting vessel 1 and brought into the guide frame 32.

By rotating the friction pulley of the lifting installation, the support clamp 7 is lifted with a replaceable rope above the mounting bridge 8.

Dismantling of the support clamp and simultaneous winding from the transport coil 18 of the attached rope and the replaced rope from the barrel to the friction pulley 2 with a special shell are carried out.

When approaching the end of the replaced rope (see Fig. 4) to the support bridge 8, the guide frame 32 is removed from it. The hanging and replaced ropes are completely placed on the friction pulley with a special shell.

The end (see Fig. 5) 33 of the hanging rope is started through the deflecting pulley 28 under the mounting bridge 8, where the guide frame 32 is mounted on it. The end 30 of the replaced rope is brought into the winch for changing the rope weight (SNK) 34 on the surface of the shaft.

By rotating the friction pulley of the lifting installation, the hinged and pulled onto the shaft SNK 34 are simultaneously fed onto the shaft of the replaced ropes.

When approaching (see Fig.6) the end 33 of the hanging rope to the lifting vessel 1, the rotation of the friction pulley stops, the guide frame 32 is dismantled. The end of the hanging rope is mounted in a free hitch of the lifting vessel 1.

In the pile driver, a support clamp 7 is installed on the hanging rope.

The part of the hanging rope remaining on the friction pulley is wound up and laid in the bay 35 next to the friction pulley. The part of the replaced rope remaining on the friction pulley is wound onto SNK 34 on the surface of the shaft.

The operations described above are performed with the remaining ropes of a multi-rope hoist.

The friction pulley 2 is freed from a special shell. Two plastic blocks are installed.

The ends (see Fig. 7) 17 of all hanging ropes are alternately stacked on the friction pulley and are mounted in the hook-on devices 13 of the lifting vessel 11.

Using a crane (see Fig. 8) 9 and slings 10, the lifting vessel 11 is lifted. A mounting bridge is dismantled from under it. With a crane, the lifting vessel 11 is lowered to the formation of slack in the slings 10. The slings are dismantled.

By rotating the friction pulley of the lifting installation, the support clamps 7 are lifted above the mounting bridge 8 and the lifting vessel 1 above the mounting bridge 3. The mounting bridge 8 is removed, the supporting clamps 7 from the mounted ropes, and the mounting bridge 3 from under the lifting vessel 1.

To implement the method, a friction pulley (see Fig. 9) is used for a lifting installation, consisting of a pulley 36 connected to hubs 37 mounted on the shaft 23, with trapezoidal shaped plastic lining 38 by shell 39 with a unified fastening in the form of wedge-shaped segments 40, pressed bolts 41 through holes in the friction pulley in increments of 42.

Two plastic compounds 16 and 25 are removed from the friction pulley and a hole 17 is made for winding the end of the hinged end and a hole 26 for winding the end of the replaced ropes.

A special flexible shell of a conveyor belt 43 having a width equal to the width of the drum and a thickness of at least 15 mm, with rivets 44 attached to it with a pitch of 45 (at least 500 mm.) Is installed on the friction pulley 2 (see Fig. 10). , a multiple step of the holes in the friction pulley, transverse plates 46, for example of steel with dividers 47 of the same material, placed across the plates perpendicular to their surface, in the middle of a special shell, oriented outward from the surface of the friction pulley, and holes 48 for fixing bolts, by A special flexible shell is pressed against the friction pulley through the holes in it instead of the previously removed bolts 41, which serve to secure the wedge-shaped segments 40.

The use of the method of replacing the ropes of a mine hoist with a friction pulley allows you to save the time of work on replacing the ropes, reduce the risk of mechanical damage to the ropes, refuse to use auxiliary winches and mechanisms, facilitate the control of the electric drive of the hoist during the replacement of the ropes.

The invention improves the manufacturability and reliability of methods for replacing ropes, eliminates unwanted contact of the ropes with the friction pulley shell, reduces the stopping time of the lifting installation for replacing ropes and the complexity of the work.

Information sources

1. USSR Copyright Certificate No. 1106779A, cl. B66B 19/02, 1984

2. USSR author's certificate No. 1627492A1, cl. B66B 19/02, 1986

Claims (2)

1. A method of replacing the ropes of a mine lifting installation with a friction pulley, including disconnecting vessels fixed to the horizon from the head ropes, issuing replaced ropes to the surface by exhausting them onto the friction pulley and winding from the friction pulley onto the shaft surface, winding the hanging rope from the shaft surface to the pulley friction, the supply of hanging ropes to the shaft of the shaft and their subsequent connection to the lifting vessels, characterized in that the ends of the replaced and hanging ropes are mounted simultaneously on one pulley tr Nia, which during rotation is carried out simultaneously with the winding-hang the rope surface and the shaft of the rope to be replaced from the stem on the friction pulley with subsequent feed-hang at the rope winding-barrel and replaced with the rope pulley on the shaft friction surface. 2. A device for implementing the method, including a welded pulley with hubs mounted on the shaft and with a lining of plastic compound bars, characterized in that a special flexible shell with transverse plates attached to it with a step that is a multiple of the distance between the rows of holes is attached to the outer surface of the friction pulley in the friction pulley for mounting wedge-shaped segments, dividers are attached to the plates, placed across the plates perpendicular to their surface in the middle of a special shell and orient ated outwardly from the friction surface of the pulley.

Images